---
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:

  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…
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'
---

## Overview

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

- `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`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.