{ "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-2026-23274", "tracking": { "current_release_date": "2026-04-02T16:20:03.904224Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-23274", "initial_release_date": "2026-03-20T18:27:36.681549Z", "revision_history": [ { "date": "2026-03-20T18:27:36.681549Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| Products created (5).| Products connected (3).| References created (3)." }, { "date": "2026-03-20T18:27:45.343422Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-20T18:28:41.181965Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| References created (3)." }, { "date": "2026-03-20T18:32:34.522302Z", "number": "4", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (11)." }, { "date": "2026-03-20T18:32:38.020722Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-03-20T18:44:38.989338Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Products connected (2)." }, { "date": "2026-03-20T18:44:44.343943Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-03-20T22:18:36.101468Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-20T22:18:44.999438Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-03-21T00:28:08.287682Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (13).| Product Identifiers created (5).| References created (3).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-21T00:28:13.520938Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-03-21T06:43:47.334102Z", "number": "12", "summary": "Description created for source." }, { "date": "2026-03-21T12:19:53.227055Z", "number": "13", "summary": "Source connected.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1)." }, { "date": "2026-03-21T12:19:56.552177Z", "number": "14", "summary": "NCSC Score updated." }, { "date": "2026-03-25T10:40:04.072744Z", "number": "15", "summary": "Products created (3).| Products connected (3).| References created (3)." }, { "date": "2026-03-25T10:40:08.826714Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-03-25T11:28:16.372507Z", "number": "17", "summary": "References created (3)." }, { "date": "2026-03-28T12:19:49.632439Z", "number": "18", "summary": "Product Remediations created (1)." }, { "date": "2026-03-28T12:19:53.418067Z", "number": "19", "summary": "NCSC Score updated." }, { "date": "2026-04-02T09:56:46.942288Z", "number": "20", "summary": "Products connected (1).| References created (1)." }, { "date": "2026-04-02T09:56:50.455867Z", "number": "21", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:26:37.686039Z", "number": "22", "summary": "CVSS created." }, { "date": "2026-04-02T15:26:40.174608Z", "number": "23", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:40:20.248318Z", "number": "24", "summary": "CVSS created." } ], "status": "interim", "version": "24" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1330296", "product_identification_helper": { "cpe": "cpe:/o:amazon:linux_2:-" } } } ], "category": "product_name", "name": "Amazon Linux 2" } ], "category": "vendor", "name": "Amazon" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<28c7cfaf0c0ab17cbd7754092116fd1af45271f9", "product": { "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<28c7cfaf0c0ab17cbd7754092116fd1af45271f9", "product_id": "CSAFPID-5904881" } }, { "category": "product_version_range", "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf", "product": { "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf", "product_id": "CSAFPID-5874532" } }, { "category": "product_version_range", "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<54080355999381fed4a26129579a5765bab87491", "product": { "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<54080355999381fed4a26129579a5765bab87491", "product_id": "CSAFPID-5904882" } }, { "category": "product_version_range", "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<5e7ece24c5cb75a60402aad4d803c7898ea40aa9", "product": { "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|<5e7ece24c5cb75a60402aad4d803c7898ea40aa9", "product_id": "CSAFPID-5904883" } }, { "category": "product_version_range", "name": "vers:git/68983a354a655c35d3fb204489d383a2a051fda7|timer.\n\nIf the label was created first by revision 1 with XT_IDLETIMER_ALARM,\nthe object uses alarm timer semantics and timer->timer is never initialized.\nReusing that object from revision 0 causes mod_timer() on an uninitialized\ntimer_list, triggering debugobjects warnings and possible panic when\npanic_on_warn=1.\n\nFix this by rejecting revision 0 rule insertion when an existing timer with\nthe same label is of ALARM type.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23274.json" }, { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels\n\nIDLETIMER revision 0 rules reuse existing timers by label and always call\nmod_timer() on timer->timer.\n\nIf the label was created first by revision 1 with XT_IDLETIMER_ALARM,\nthe object uses alarm timer semantics and timer->timer is never initialized.\nReusing that object from revision 0 causes mod_timer() on an uninitialized\ntimer_list, triggering debugobjects warnings and possible panic when\npanic_on_warn=1.\n\nFix this by rejecting revision 0 rule insertion when an existing timer with\nthe same label is of ALARM type.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23274" }, { "category": "description", "text": "A flaw was found in the Linux kernel's netfilter: xt_IDLETIMER module. This vulnerability occurs when revision 0 rules attempt to reuse a timer label previously created by revision 1 with alarm timer semantics. This action can lead to calling mod_timer() on an uninitialized timer list. A local attacker could potentially trigger debug object warnings and, under certain configurations, cause a kernel panic, leading to a Denial of Service (DoS).", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23274.json" }, { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call mod_timer() on timer->timer. If the label was created first by revision 1 with XT_IDLETIMER_ALARM, the object uses alarm timer semantics and timer->timer is never initialized. Reusing that object from revision 0 causes mod_timer() on an uninitialized timer_list, triggering debugobjects warnings and possible panic when panic_on_warn=1. Fix this by rejecting revision 0 rule insertion when an existing timer with the same label is of ALARM type.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-23274" }, { "category": "description", "text": "netfilter: xt\\_IDLETIMER: reject rev0 reuse of ALARM timer labels", "title": "microsoft - https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar" }, { "category": "other", "text": "0.00017", "title": "EPSS" }, { "category": "other", "text": "3.9", "title": "NCSC Score" }, { "category": "other", "text": "VENDOR FIX as product remediation category", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "The value of the most recent EPSS score, Is related to a product by vendor Linux, Is related to a product by vendor Debian", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-1287240", "CSAFPID-5874530", "CSAFPID-5874531", "CSAFPID-5874532", "CSAFPID-1330297", "CSAFPID-2036021", "CSAFPID-2036024", "CSAFPID-1439319", "CSAFPID-1453381", "CSAFPID-1453382", "CSAFPID-2858634", "CSAFPID-2858635", "CSAFPID-5761981", "CSAFPID-5904881", "CSAFPID-5904882", "CSAFPID-5904883", "CSAFPID-1330296" ], "known_not_affected": [ "CSAFPID-1287241", "CSAFPID-5844856", "CSAFPID-5874533", "CSAFPID-5874534", "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439321", "CSAFPID-1453376", "CSAFPID-1453377", "CSAFPID-1453378", "CSAFPID-1453379", "CSAFPID-1453380", "CSAFPID-5904647", "CSAFPID-5904654", "CSAFPID-5904671" ] }, "references": [ { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23274.json" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23274" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0809.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-23274" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23274.json" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/f5ef97c13165542480a6ffdbe6f09f40bbb7cbf1" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/f228b9ae2a7e84d1153616d8e71c4236cb1f1309" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/329f0b9b48ee6ab59d1ab72fef55fe8c6463a6cf" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0809.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0809" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032031-CVE-2026-23271-657a@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032034-CVE-2026-23272-8ad1@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032034-CVE-2026-23273-3669@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032034-CVE-2026-23274-ba1d@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032035-CVE-2026-23275-33fe@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032035-CVE-2026-23276-7fd3@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032036-CVE-2026-23277-e478@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026032036-CVE-2026-23278-4dcc@gregkh/" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-23274" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23274" }, { "category": "external", "summary": "Reference - redhat", "url": "https://lore.kernel.org/linux-cve-announce/2026032034-CVE-2026-23274-ba1d@gregkh/T" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/28c7cfaf0c0ab17cbd7754092116fd1af45271f9" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/54080355999381fed4a26129579a5765bab87491" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/5e7ece24c5cb75a60402aad4d803c7898ea40aa9" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://alas.aws.amazon.com/AL2/ALAS2KERNEL-5.10-2026-115.html" } ], "remediations": [ { "category": "vendor_fix", "details": "CBL-Mariner Releases", "product_ids": [ "CSAFPID-5761981" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "products": [ "CSAFPID-1287240", "CSAFPID-1330296", "CSAFPID-1330297", "CSAFPID-1439319", "CSAFPID-1453381", "CSAFPID-1453382", "CSAFPID-2036021", "CSAFPID-2036024", "CSAFPID-2858634", "CSAFPID-2858635", "CSAFPID-5761981", "CSAFPID-5874530", "CSAFPID-5874531", "CSAFPID-5874532", "CSAFPID-5904881", "CSAFPID-5904882", "CSAFPID-5904883" ] } ], "title": "CVE-2026-23274" } ] }