Expired Pointer Dereference Affecting xorg-x11-server-source package, versions *


Severity

Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.01% (4th percentile)

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  • Snyk IDSNYK-CENTOS8-XORGX11SERVERSOURCE-16240652
  • published24 Apr 2026
  • disclosed23 Apr 2026

Introduced: 23 Apr 2026

NewCVE-2026-34001  (opens in a new tab)
CWE-825  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 xorg-x11-server-source.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-source package and not the xorg-x11-server-source package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.

CVSS Base Scores

version 3.1