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-13505926
  • published9 Oct 2025
  • disclosed25 Feb 2025

Introduced: 25 Feb 2025

CVE-2025-26596  (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 heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.

CVSS Base Scores

version 3.1