Expired Pointer Dereference Affecting tigervnc-icons package, versions <0:1.14.1-3.amzn2023.0.5


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-AMZN2023-TIGERVNCICONS-16352407
  • published3 May 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?

Upgrade Amazon-Linux:2023 tigervnc-icons to version 0:1.14.1-3.amzn2023.0.5 or higher.
This issue was patched in ALAS2023-2026-1626.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tigervnc-icons package and not the tigervnc-icons package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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