Vulnerability DatabaseCVE-2026-93524
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CVE-2026-93524
Published:October 28, 2026
Updated:November 04, 2026
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 Packages
xwayland (CONDA):
Affected version(s) =24.1.13 <24.1.14
Fix Suggestion:
Update to version 24.1.14
xorg-xvfb-server (CONDA):
Affected version(s) >=21.1.23 <21.1.25
Fix Suggestion:
Update to version 21.1.25
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xwayland-26.0.99.901 <xwayland-26.0.99.903
Fix Suggestion:
Update to version xwayland-26.0.99.903
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) =xorg-server-0_99_1 <xorg-server-21.1.25 || >=xorg-server-1_0_99_1 <xorg-server-21.1.25 || >=xorg-server-21.0.99.1 <xorg-server-21.1.25
Fix Suggestion:
Update to version xorg-server-21.1.25
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xorg-server-26.0.99.901 <xorg-server-26.0.99.903
Fix Suggestion:
Update to version xorg-server-26.0.99.903
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xwayland-21.0.99.901 <xwayland-24.1.14 || >=xwayland-22.0.99.901 <xwayland-24.1.14 || >=xwayland-23.0.99.901 <xwayland-24.1.14 || >=xwayland-24.0.99.901 <xwayland-24.1.14
Fix Suggestion:
Update to version xwayland-24.1.14
Related Resources (4)
https://gitlab.freedesktop.org/xorg/xserver
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93524.json
https://gitlab.freedesktop.org/xorg/xserver/-/commit/cea71d0273e4d5092aa9c6a8a770734c8935c02e
https://nvd.nist.gov/vuln/detail/CVE-2026-93524
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CVSS v4
Base Score:
6.9
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Buffer Over-read
CWE-126
EPSS
Base Score:
0.18