# CVE-2026-80912

## Summary

- **CVE ID:** CVE-2026-80912
- **Severity:** UNKNOWN
- **CVSS Score:** 1.51
- **CWE:** N/A
- **Published:** Sep 4, 2026
- **Last Modified:** Sep 16, 2026

## Description

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.

## Affected Products

- Linux — Linux (55fcf09b3fe4325c9395ebbb0322a547a157ebc7)
- Linux — Linux (2.6.23)
- Linux — Linux (0)
- Linux — Linux (6.6.153)
- Linux — Linux (6.12.105)
- Linux — Linux (6.18.46)
- Linux — Linux (7.1.10)
- Linux — Linux (7.2)
- Linux — Linux (5.10.270)
- Linux — Linux (5.15.221)
- Linux — Linux (6.1.188)

## References

- [CNA](https://git.kernel.org/stable/c/e0285bb152211c00900136b66d4b420c14a59094)
- [CNA](https://git.kernel.org/stable/c/099869e9343a5f8c22b58497f074b34f63cbf856)
- [CNA](https://git.kernel.org/stable/c/841aea4d5a25e16273d04cd07a74142b4687e03b)
- [CNA](https://git.kernel.org/stable/c/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a)
- [CNA](https://git.kernel.org/stable/c/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd)
- [CNA](https://git.kernel.org/stable/c/d2e7f7035d6f407119ba5467f7218cc4370844fc)
- [CNA](https://git.kernel.org/stable/c/f38a71868888285efc9c0ab5b032e23919c5a0a1)
- [CNA](https://git.kernel.org/stable/c/3480c081c23d559fd9a6921b76955664f2e95153)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._