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CVE-2026-93524

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

MEDIUM
6.9
CVSS Score
Published: October 28, 2026 at 04:24 PM UTC
Updated: October 29, 2026 at 03:04 PM UTC
2 products affected across 1 vendorXwaylandxorg-x11-server

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Severity
MEDIUM6.9
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Xwayland· X Org
90%
All versions
xorg-x11-server· X Org
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Patch
Source: cverecord
https://gitlab.freedesktop.org/xorg/xserver/-/commit/cea71d0273e4d5092aa9c6a8a770734c8935c02e

CVSS

6.9MEDIUMsuse
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-126

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