CVE-2026-109091
Published:November 10, 2026
Updated:November 11, 2026
The X.Org X server (Xorg) records EDID Display-Range (DS_RANGES) descriptors into the fixed-size MonRec hsync[]/vrefresh[] arrays without checking MAX_HSYNC/MAX_VREFRESH. A malicious monitor or crafted EDID can overrun those arrays (out-of-bounds write). Fixed in xorg-server 21.1.26 (X.Org Security Advisory, 2026-11-10).
Affected Packages
https://gitlab.freedesktop.org/xorg/xserver.git (SCM_GIT):
Affected version(s) >=xorg-server-1.7.99.2 <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 (1)
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Contact UsCVSS v4
Base Score:
7
Attack Vector
PHYSICAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH