CVE-2026-109091

HIGH 7.8

X.Org Server EDID DS_RANGES Out-Of-Bounds Write

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

A buffer overflow in handling EDID Display-Range descriptors in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by malicious monitors to crash the x server or execute cote.

CWE	CWE-122
Vendor	x.org
Product	xwayland
Published	Nov 13, 2026
Last Updated	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

X.Org / xwayland

0 < 24.1.15

X.Org / xorg-x11-server

0 < 21.1.26

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.freedesktop.org: https://gitlab.freedesktop.org/xorg/xserver/-/commit/56e4ab6e8d94222480c8d7a28f530334059e3ab7 gitlab.freedesktop.org: https://gitlab.freedesktop.org/xorg/xserver/-/commit/d88f0f7fdb2834c24feca63c0af5f46a57f4a04c

Credits

Eun0us / Espilon <[email protected]>