CVE-2026-93524

X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read

State: Published
Severity: 6.9 Medium
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Sep 18, 2026

Description

A buffer overread in CheckKeySyms() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to leak small amounts of information from X server memory or potentially crash the X server.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N	suse

Weaknesses

CWE-126 Buffer over-read

Affected Products

Product	Versions
xorg-x11-serverx.org	before 21.1.25Affected
xwaylandx.org	before 24.1.14Affected

References

https://gitlab.freedesktop.org/xorg/xserver/-/commit/cea71d0273e4d5092aa9c6a8a770734c8935c02epatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.