Out-of-bounds Read Affecting xorg-x11-server-common package, versions <0:1.20.11-7.el8_6


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-RHEL8-XORGX11SERVERCOMMON-17006147
  • published28 May 2026
  • disclosed23 Apr 2026

Introduced: 23 Apr 2026

CVE-2026-34003  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade RHEL:8 xorg-x11-server-common to version 0:1.20.11-7.el8_6 or higher.
This issue was patched in RHSA-2026:21718.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-common package and not the xorg-x11-server-common package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.

CVSS Base Scores

version 3.1