Use After Free The advisory has been revoked - it doesn't affect any version of package xorg-x11-server (opens in a new tab)

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Snyk IDSNYK-RHEL8-XORGX11SERVER-17223646
published7 Jun 2026
disclosed2 Jun 2026

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Introduced: 2 Jun 2026

CVE-2026-50263 (opens in a new tab) CWE-416 (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 use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.