Use After Free Affecting xorg-x11-server-Xwayland package, versions <0:24.1.9-4.el9_8.3


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.19% (10th percentile)

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  • Snyk IDSNYK-ROCKY9-XORGX11SERVERXWAYLAND-17975892
  • published15 Jul 2026
  • disclosed8 Jul 2026

Introduced: 8 Jul 2026

NewCVE-2026-56000  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 xorg-x11-server-Xwayland to version 0:24.1.9-4.el9_8.3 or higher.
This issue was patched in RLSA-2026:38490.

NVD Description

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

Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.

CVSS Base Scores

version 3.1