CVE-2025-40322 Affecting kernel-rt-debuginfo package, versions <0:4.18.0-553.100.1.rt7.441.el8_10


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.03% (10th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ROCKY8-KERNELRTDEBUGINFO-15267726
  • published12 Feb 2026
  • disclosed8 Dec 2025

Introduced: 8 Dec 2025

CVE-2025-40322  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 kernel-rt-debuginfo to version 0:4.18.0-553.100.1.rt7.441.el8_10 or higher.
This issue was patched in RLSA-2026:1661.

NVD Description

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

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

fbdev: bitblit: bound-check glyph index in bit_putcs*

bit_putcs_aligned()/unaligned() derived the glyph pointer from the character value masked by 0xff/0x1ff, which may exceed the actual font's glyph count and read past the end of the built-in font array. Clamp the index to the actual glyph count before computing the address.

This fixes a global out-of-bounds read reported by syzbot.

CVSS Base Scores

version 3.1