Expired Pointer Dereference Affecting xorg-x11-server-sdk package, versions <21.1.4-150500.7.46.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.26% (18th percentile)

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  • Snyk IDSNYK-SLES155-XORGX11SERVERSDK-16091963
  • published16 Apr 2026
  • disclosed14 Apr 2026

Introduced: 14 Apr 2026

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

How to fix?

Upgrade SLES:15.5 xorg-x11-server-sdk to version 21.1.4-150500.7.46.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-sdk package and not the xorg-x11-server-sdk package as distributed by SLES. See How to fix? for SLES:15.5 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.

References

CVSS Base Scores

version 3.1