CVE-2026-45884

5.5 Moyenne

Publiée le 27/05/2026 à 16:17 · Modifiée le 25/06/2026 à 23:12 · Analysée par le NVD · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: apparmor: avoid per-cpu hold underflow in aa_get_buffer When aa_get_buffer() pulls from the per-cpu list it unconditionally decrements cache->hold. If hold reaches 0 while count is still non-zero, the unsigned decrement wraps to UINT_MAX. This keeps hold non-zero for a very long time, so aa_put_buffer() never returns buffers to the global list, which can starve other CPUs and force repeated kmalloc(aa_g_path_max) allocations. Guard the decrement so hold never underflows.

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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	5.5 Moyenne	nvd@nist.gov (NVD)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`

Faiblesses (CWE)

CWE-191

Références

https://git.kernel.org/stable/c/202824a1f89a9786c20a3d646a7c88d223abb1b2 Patch
https://git.kernel.org/stable/c/4bcddd0f6b2e52b4c7b520e4d36a115caf5b7169 Patch
https://git.kernel.org/stable/c/640cf2f09575c9dc344b3f7be2498d31e3923ead Patch
https://git.kernel.org/stable/c/80c334acc6d0bee8605a358a33e69b4aea1ffb92 Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories