CVE-2025-62231
October 30, 2025
A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.
Affected Packages
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xwayland-24.0.99.901 <xwayland-24.1.9Fix Suggestion:
Update to version xwayland-24.1.9https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xorg-server-21.1.14 <xorg-server-21.1.19Fix Suggestion:
Update to version xorg-server-21.1.19Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (38)
Do you need more information?
Contact UsCVSS v4
Base Score:
7
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Integer Overflow or Wraparound
EPSS
Base Score:
0.01
