Use After Free Affecting kernel-rt-debug-modules package, versions <0:4.18.0-553.171.1.rt7.512.el8_10


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.16% (6th percentile)

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  • Snyk IDSNYK-ALMALINUX8-KERNELRTDEBUGMODULES-20553494
  • published7 Oct 2026
  • disclosed5 Oct 2026

Introduced: 5 Oct 2026

NewCVE-2026-45861  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 kernel-rt-debug-modules to version 0:4.18.0-553.171.1.rt7.512.el8_10 or higher.
This issue was patched in ALSA-2026:75746.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-modules package and not the kernel-rt-debug-modules package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

gfs2: Fix slab-use-after-free in qd_put

Commit a475c5dd16e5 ("gfs2: Free quota data objects synchronously") started freeing quota data objects during filesystem shutdown instead of putting them back onto the LRU list, but it failed to remove these objects from the LRU list, causing LRU list corruption. This caused use-after-free when the shrinker (gfs2_qd_shrink_scan) tried to access already-freed objects on the LRU list.

Fix this by removing qd objects from the LRU list before freeing them in qd_put().

Initial fix from Deepanshu Kartikey <kartikey406@gmail.com>.

CVSS Base Scores

version 3.1