Expired Pointer Dereference The advisory has been revoked - it doesn't affect any version of package xorg-x11-server (opens in a new tab)

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0.26% (18^th percentile)

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Snyk IDSNYK-RHEL8-XORGX11SERVER-16240637
published24 Apr 2026
disclosed23 Apr 2026

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Introduced: 23 Apr 2026

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

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:8.

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 RHEL.

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.