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


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.39% (31st percentile)

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  • Snyk IDSNYK-ROCKY9-XORGX11SERVER-13505912
  • published9 Oct 2025
  • disclosed25 Feb 2025

Introduced: 25 Feb 2025

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

How to fix?

Upgrade Rocky-Linux:9 xorg-x11-server to version 0:1.20.11-28.el9_6 or higher.
This issue was patched in RLSA-2025:7163.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server package and not the xorg-x11-server package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux: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