{"id":"CVE-2026-80912","title":"selinux: reject an unclaimed class value in security_get_classes()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: reject an unclaimed class value in security_get_classes()\n\nsecurity_get_classes() sizes an array by p_classes.nprim and fills it at\nvalue - 1, so a class value…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < d2e7f7035d6f407119ba5467f7218cc4370844fc","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < f38a71868888285efc9c0ab5b032e23919c5a0a1","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 3480c081c23d559fd9a6921b76955664f2e95153","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < e0285bb152211c00900136b66d4b420c14a59094","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 099869e9343a5f8c22b58497f074b34f63cbf856","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 841aea4d5a25e16273d04cd07a74142b4687e03b","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < d8a10899ea3c84b80de72ca8ee9039e9a5156c9a","Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd","Linux 2.6.23"],"published":"2026-09-04","updated":"2026-09-14","sourceUpdated":"2026-09-14T11:58:53.633Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80912","references":[{"url":"https://git.kernel.org/stable/c/d2e7f7035d6f407119ba5467f7218cc4370844fc"},{"url":"https://git.kernel.org/stable/c/f38a71868888285efc9c0ab5b032e23919c5a0a1"},{"url":"https://git.kernel.org/stable/c/3480c081c23d559fd9a6921b76955664f2e95153"},{"url":"https://git.kernel.org/stable/c/e0285bb152211c00900136b66d4b420c14a59094"},{"url":"https://git.kernel.org/stable/c/099869e9343a5f8c22b58497f074b34f63cbf856"},{"url":"https://git.kernel.org/stable/c/841aea4d5a25e16273d04cd07a74142b4687e03b"},{"url":"https://git.kernel.org/stable/c/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a"},{"url":"https://git.kernel.org/stable/c/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd"}],"tags":["cve.org"],"epss":0.00165,"epssPercentile":0.06102,"ingestedAt":"2026-09-14T15:23:07.455Z","slug":"CVE-2026-80912","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nselinux: reject an unclaimed class value in security_get_classes()\n\nsecurity_get_classes() sizes an array by p_classes.nprim and fills it at\nvalue - 1, so a class value the policy never defines leaves a NULL.\nsel_make_classes() passes every entry to sel_make_dir(), reaching the same\nd_alloc_name() dereference as the permission array. The class symbol table\nis allowed to be sparse (policydb_class_isvalid() exists to absorb that),\nbut this getter builds its own array straight from the hash table and has\nno such predicate.\n\nFail the lookup when a value went unclaimed instead of handing out the\nNULL. Conforming policies define every class they declare and are\nunaffected.\n\n## Affected\n\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < d2e7f7035d6f407119ba5467f7218cc4370844fc`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < f38a71868888285efc9c0ab5b032e23919c5a0a1`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 3480c081c23d559fd9a6921b76955664f2e95153`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < e0285bb152211c00900136b66d4b420c14a59094`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 099869e9343a5f8c22b58497f074b34f63cbf856`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 841aea4d5a25e16273d04cd07a74142b4687e03b`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < d8a10899ea3c84b80de72ca8ee9039e9a5156c9a`\n- `Linux >= 55fcf09b3fe4325c9395ebbb0322a547a157ebc7 < 22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd`\n- `Linux 2.6.23`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}