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Out-of-bounds Read The advisory has been revoked - it doesn't affect any version of package xorg-x11-server-Xnest  (opens in a new tab)

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EPSS
0.49% (42nd percentile)

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  • Snyk IDSNYK-RHEL7-XORGX11SERVERXNEST-16434484
  • published6 May 2026
  • disclosed5 May 2026
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Introduced: 5 May 2026

CVE-2026-34000  (opens in a new tab)
CWE-125  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:7.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-Xnest package and not the xorg-x11-server-Xnest package as distributed by RHEL.

A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the CheckSetGeom() and XkbAddGeomKeyAlias functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.

References