Out-of-bounds Write Affecting xorg-x11-server-common package, versions <0:1.20.11-28.el9_6


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.44% (38th percentile)

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  • Snyk IDSNYK-ALMALINUX9-XORGX11SERVERCOMMON-10590091
  • published3 Jul 2025
  • disclosed13 May 2025

Introduced: 13 May 2025

CVE-2025-26595  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 xorg-x11-server-common to version 0:1.20.11-28.el9_6 or higher.
This issue was patched in ALSA-2025:7163.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-common package and not the xorg-x11-server-common package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

CVSS Base Scores

version 3.1