CVE-2026-109904
Published:November 13, 2026
Updated:November 13, 2026
A buffer overread caused by an integer-overflow in Proc/SProcXResQueryClientIds in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by attackers on authenticated X clients to crash the server or leak out information.
Affected Packages
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xwayland-21.0.99.901 <xwayland-24.1.15 || >=xwayland-22.0.99.901 <xwayland-24.1.15 || >=xwayland-23.0.99.901 <xwayland-24.1.15 || >=xwayland-24.0.99.901 <xwayland-24.1.15Fix Suggestion:
Update to version xwayland-24.1.15https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xorg-server-1.12.99.901 <xorg-server-21.1.26 || >=xorg-server-21.0.99.1 <xorg-server-21.1.26Fix Suggestion:
Update to version xorg-server-21.1.26Related Resources (2)
Do you need more information?
Contact UsCVSS 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