CVE-2026-80912 Affecting kernel6.18-modules-extra-common package, versions <1:6.18.48-107.148.amzn2023
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2023-KERNEL618MODULESEXTRACOMMON-20249826
- published29 Sept 2026
- disclosed4 Sept 2026
Introduced: 4 Sep 2026
NewCVE-2026-80912 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 kernel6.18-modules-extra-common to version 1:6.18.48-107.148.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3139.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel6.18-modules-extra-common package and not the kernel6.18-modules-extra-common package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
selinux: reject an unclaimed class value in security_get_classes()
security_get_classes() sizes an array by p_classes.nprim and fills it at value - 1, so a class value the policy never defines leaves a NULL. sel_make_classes() passes every entry to sel_make_dir(), reaching the same d_alloc_name() dereference as the permission array. The class symbol table is allowed to be sparse (policydb_class_isvalid() exists to absorb that), but this getter builds its own array straight from the hash table and has no such predicate.
Fail the lookup when a value went unclaimed instead of handing out the NULL. Conforming policies define every class they declare and are unaffected.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-80912
- https://git.kernel.org/stable/c/099869e9343a5f8c22b58497f074b34f63cbf856
- https://git.kernel.org/stable/c/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd
- https://git.kernel.org/stable/c/841aea4d5a25e16273d04cd07a74142b4687e03b
- https://git.kernel.org/stable/c/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a
- https://git.kernel.org/stable/c/e0285bb152211c00900136b66d4b420c14a59094
- https://git.kernel.org/stable/c/3480c081c23d559fd9a6921b76955664f2e95153
- https://git.kernel.org/stable/c/d2e7f7035d6f407119ba5467f7218cc4370844fc
- https://git.kernel.org/stable/c/f38a71868888285efc9c0ab5b032e23919c5a0a1