Use After Free Affecting xorg-server package, versions <2:21.1.16-1.3+deb13u4+e2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.19% (10th percentile)

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  • Snyk IDSNYK-ECHOLATEST-XORGSERVER-20557366
  • published7 Oct 2026
  • disclosed28 Oct 2026

Introduced: 7 Oct 2026

NewCVE-2026-93515  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Echo:latest xorg-server to version 2:21.1.16-1.3+deb13u4+e2 or higher.

NVD Description

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

A use-after-free in present_clear_window_notifies() in the X.org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by malicious X clients to crash or potentially execute code in the X server context.

CVSS Base Scores

version 3.1