{ "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-2026-23408", "tracking": { "current_release_date": "2026-04-02T15:40:04.911077Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-23408", "initial_release_date": "2026-04-01T09:25:33.169866Z", "revision_history": [ { "date": "2026-04-01T09:25:33.169866Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| References created (5)." }, { "date": "2026-04-01T09:25:36.099209Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-04-01T09:38:42.152531Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (5).| Products connected (7).| References created (5)." }, { "date": "2026-04-01T09:38:45.701137Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-04-01T11:35:52.263684Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-04-01T12:06:08.760492Z", "number": "6", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (14)." }, { "date": "2026-04-01T12:06:16.615963Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-04-01T15:37:42.986571Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-04-01T15:37:45.931057Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-04-01T18:43:44.881064Z", "number": "10", "summary": "Source created.| CVE status created. (valid)| Products connected (2).| Product Identifiers created (2)." }, { "date": "2026-04-02T00:27:56.956170Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (13).| Product Identifiers created (5).| References created (3).| CWES updated (1)." }, { "date": "2026-04-02T00:28:05.523650Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-04-02T06:44:42.637204Z", "number": "13", "summary": "Description created for source." }, { "date": "2026-04-02T08:05:50.845520Z", "number": "14", "summary": "Products connected (1).| References created (1)." }, { "date": "2026-04-02T15:28:24.165026Z", "number": "15", "summary": "CVSS created." }, { "date": "2026-04-02T15:28:27.432726Z", "number": "16", "summary": "NCSC Score updated." }, { "date": "2026-04-02T15:39:50.229151Z", "number": "17", "summary": "CVSS created." }, { "date": "2026-04-02T15:39:56.655325Z", "number": "18", "summary": "NCSC Score updated." } ], "status": "interim", "version": "18" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<18b5233e860c294a847ee07869d93c0b8673a54b", "product": { "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<18b5233e860c294a847ee07869d93c0b8673a54b", "product_id": "CSAFPID-5971765" } }, { "category": "product_version_range", "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a", "product": { "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a", "product_id": "CSAFPID-5971762" } }, { "category": "product_version_range", "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<5df0c44e8f5f619d3beb871207aded7c78414502", "product": { "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<5df0c44e8f5f619d3beb871207aded7c78414502", "product_id": "CSAFPID-5971766" } }, { "category": "product_version_range", "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<7998ab3010d2317643f91828f1853d954ef31387", "product": { "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<7998ab3010d2317643f91828f1853d954ef31387", "product_id": "CSAFPID-5971764" } }, { "category": "product_version_range", "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<86feeccd6b93ed94bd6655f30de80f163f8d5a45", "product": { "name": "vers:git/145a0ef21c8e944957f58e2c8ffcd8a10f46266a|<86feeccd6b93ed94bd6655f30de80f163f8d5a45", "product_id": "CSAFPID-5971763" } }, { "category": "product_version_range", "name": "vers:semver/6.12.77|<=6.12.*", "product": { "name": "vers:semver/6.12.77|<=6.12.*", "product_id": "CSAFPID-5815258" } }, { "category": "product_version_range", "name": "vers:semver/6.18.18|<=6.18.*", "product": { "name": "vers:semver/6.18.18|<=6.18.*", "product_id": "CSAFPID-5843471" } }, { "category": "product_version_range", "name": "vers:semver/6.19.8|<=6.19.*", "product": { "name": "vers:semver/6.19.8|<=6.19.*", "product_id": "CSAFPID-5843472" } }, { "category": "product_version_range", "name": "vers:semver/6.6.130|<=6.6.*", "product": { "name": "vers:semver/6.6.130|<=6.6.*", "product_id": "CSAFPID-5904647" } }, { "category": "product_version_range", "name": "vers:semver/<5.5", "product": { "name": "vers:semver/<5.5", "product_id": "CSAFPID-1331837" } }, { "category": "product_version_range", "name": "vers:unknown/5.5", "product": { "name": "vers:unknown/5.5", "product_id": "CSAFPID-1331836" } }, { "category": "product_version_range", "name": "vers:unknown/7.0-rc4|<=*", "product": { "name": "vers:unknown/7.0-rc4|<=*", "product_id": "CSAFPID-5844856" } } ], "category": "product_name", "name": "Linux" } ], "category": "vendor", "name": "Linux" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1330297", "product_identification_helper": { "cpe": "cpe:/o:linux:linux_kernel:-" } } } ], "category": "product_name", "name": "Open Source Linux Kernel" } ], "category": "vendor", "name": "Open Source" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-1317177", "product_identification_helper": { "cpe": "cpe:/o:oracle:linux:-" } } } ], "category": "product_name", "name": "Oracle Linux" } ], "category": "vendor", "name": "Oracle" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/10", "product": { "name": "vers:rpm/10", "product_id": "CSAFPID-2858634", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:10" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439321", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:6" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/7", "product": { "name": "vers:rpm/7", "product_id": "CSAFPID-1439315", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:7" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/8", "product": { "name": "vers:rpm/8", "product_id": "CSAFPID-1439317", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:8" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/9", "product": { "name": "vers:rpm/9", "product_id": "CSAFPID-1439319", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:9" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-2858635" } } ], "category": "product_name", "name": "kernel" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453376" } } ], "category": "product_name", "name": "kernel" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453377" } } ], "category": "product_name", "name": "kernel" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453378" } } ], "category": "product_name", "name": "kernel-rt" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453379" } } ], "category": "product_name", "name": "kernel" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453380" } } ], "category": "product_name", "name": "kernel-rt" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453381" } } ], "category": "product_name", "name": "kernel" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-1453382" } } ], "category": "product_name", "name": "kernel-rt" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/6.1.164-1", "product": { "name": "vers:deb/6.1.164-1", "product_id": "CSAFPID-5812295", "product_identification_helper": { "purl": "pkg:deb/debian/linux@6.1.164-1?distro=bookworm" } } } ], "category": "product_name", "name": "linux" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/5.10.251-1", "product": { "name": "vers:deb/5.10.251-1", "product_id": "CSAFPID-5815374", "product_identification_helper": { "purl": "pkg:deb/debian/linux@5.10.251-1?distro=bullseye" } } } ], "category": "product_name", "name": "linux" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-23408", "cwe": { "id": "CWE-1341", "name": "Multiple Releases of Same Resource or Handle" }, "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix double free of ns_name in aa_replace_profiles()\n\nif ns_name is NULL after\n1071 error = aa_unpack(udata, &lh, &ns_name);\n\nand if ent->ns_name contains an ns_name in\n1089 } else if (ent->ns_name) {\n\nthen ns_name is assigned the ent->ns_name\n1095 ns_name = ent->ns_name;\n\nhowever ent->ns_name is freed at\n1262 aa_load_ent_free(ent);\n\nand then again when freeing ns_name at\n1270 kfree(ns_name);\n\nFix this by NULLing out ent->ns_name after it is transferred to ns_name\n\n\")", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23408" }, { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: Fix double free of ns_name in aa_replace_profiles()\n\nif ns_name is NULL after\n1071 error = aa_unpack(udata, &lh, &ns_name);\n\nand if ent->ns_name contains an ns_name in\n1089 } else if (ent->ns_name) {\n\nthen ns_name is assigned the ent->ns_name\n1095 ns_name = ent->ns_name;\n\nhowever ent->ns_name is freed at\n1262 aa_load_ent_free(ent);\n\nand then again when freeing ns_name at\n1270 kfree(ns_name);\n\nFix this by NULLing out ent->ns_name after it is transferred to ns_name\n\n\")", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23408.json" }, { "category": "description", "text": "A flaw was found in AppArmor within the Linux kernel. This vulnerability involves a double free of the `ns_name` variable in the `aa_replace_profiles()` function. This can occur when `ns_name` is assigned from `ent->ns_name` without properly nulling out `ent->ns_name`, leading to it being freed twice. A local attacker could potentially exploit this memory corruption to cause a denial of service or other unpredictable system behavior.", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23408.json" }, { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of ns_name in aa_replace_profiles() if ns_name is NULL after 1071 error = aa_unpack(udata, &lh, &ns_name); and if ent->ns_name contains an ns_name in 1089 } else if (ent->ns_name) { then ns_name is assigned the ent->ns_name 1095 ns_name = ent->ns_name; however ent->ns_name is freed at 1262 aa_load_ent_free(ent); and then again when freeing ns_name at 1270 kfree(ns_name); Fix this by NULLing out ent->ns_name after it is transferred to ns_name \")", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-23408" }, { "category": "other", "text": "0.00018", "title": "EPSS" }, { "category": "other", "text": "4.2", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde", "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", "title": "NCSC Score top decreasing factors" } ], "product_status": { "first_fixed": [ "CSAFPID-5812295", "CSAFPID-5815374" ], "known_affected": [ "CSAFPID-1331836", "CSAFPID-5971762", "CSAFPID-5971763", "CSAFPID-5971764", "CSAFPID-5971765", "CSAFPID-5971766", "CSAFPID-1330297", "CSAFPID-1317177" ], "known_not_affected": [ "CSAFPID-1331837", "CSAFPID-5815258", "CSAFPID-5843471", "CSAFPID-5843472", "CSAFPID-5844856", "CSAFPID-5904647", "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-1453376", "CSAFPID-1453377", "CSAFPID-1453378", "CSAFPID-1453379", "CSAFPID-1453380", "CSAFPID-1453381", "CSAFPID-1453382", "CSAFPID-2858634", "CSAFPID-2858635" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-23408" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23408.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0950.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-23408" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-23408.json" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/18b5233e860c294a847ee07869d93c0b8673a54b" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/5df0c44e8f5f619d3beb871207aded7c78414502" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/7998ab3010d2317643f91828f1853d954ef31387" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://git.kernel.org/stable/c/86feeccd6b93ed94bd6655f30de80f163f8d5a45" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0950.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0950" }, { "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/2026040108-CVE-2026-23401-956d@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040110-CVE-2026-23402-c852@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040111-CVE-2026-23403-f22c@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040111-CVE-2026-23404-8b0b@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040111-CVE-2026-23405-0e7a@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040112-CVE-2026-23406-0cb2@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040112-CVE-2026-23407-297e@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040113-CVE-2026-23408-1932@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040113-CVE-2026-23409-ae18@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040113-CVE-2026-23410-d7d5@gregkh/" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://lore.kernel.org/linux-cve-announce/2026040114-CVE-2026-23411-00f7@gregkh/" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-23408" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23408" }, { "category": "external", "summary": "Reference - redhat", "url": "https://lore.kernel.org/linux-cve-announce/2026040113-CVE-2026-23408-1932@gregkh/T" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://linux.oracle.com/errata/ELSA-2026-50170.html" } ], "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-1317177", "CSAFPID-1330297", "CSAFPID-1331836", "CSAFPID-5971762", "CSAFPID-5971763", "CSAFPID-5971764", "CSAFPID-5971765", "CSAFPID-5971766" ] } ], "title": "CVE-2026-23408" } ] }