Integer Underflow The advisory has been revoked - it doesn't affect any version of package xorg-x11-server (opens in a new tab)

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0.38% (30^th percentile)

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Snyk IDSNYK-RHEL8-XORGX11SERVER-16240709
published24 Apr 2026
disclosed23 Apr 2026

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Introduced: 23 Apr 2026

CVE-2026-33999 (opens in a new tab) CWE-191 (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 integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.