# CVE-2026-109091: X.Org Server EDID DS_RANGES Out-Of-Bounds Write

Status: published. Published: 2026-11-13. Updated: 2026-11-14.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: suse) — https://gitlab.freedesktop.org/xorg/xserver/-/commit/56e4ab6e8d94222480c8d7a28f530334059e3ab7
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: suse) — https://gitlab.freedesktop.org/xorg/xserver/-/commit/d88f0f7fdb2834c24feca63c0af5f46a57f4a04c

## Affected products and versions

- X.Org / xwayland (xwayland): ≥ 0; < 24.1.15 (affected, rpm). Source: CNA: suse
- X.Org / xorg-x11-server (xorg-x11-server): ≥ 0; < 21.1.26 (affected, rpm). Source: CNA: suse

## Severity and prioritization

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: CNA: suse

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H; source: NVD: meissner@suse.de

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-122

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://gitlab.freedesktop.org/xorg/xserver/-/commit/56e4ab6e8d94222480c8d7a28f530334059e3ab7 (CNA: suse; patch)

- https://gitlab.freedesktop.org/xorg/xserver/-/commit/d88f0f7fdb2834c24feca63c0af5f46a57f4a04c (CNA: suse; patch)

- https://gitlab.freedesktop.org/xorg/xserver/-/commit/56e4ab6e8d94222480c8d7a28f530334059e3ab7 (meissner@suse.de)

- https://gitlab.freedesktop.org/xorg/xserver/-/commit/d88f0f7fdb2834c24feca63c0af5f46a57f4a04c (meissner@suse.de)

## Provenance

- CNA: suse: https://www.cve.org/CVERecord?id=CVE-2026-109091; retrieved 2026-11-14; source updated 2026-11-14

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109091; retrieved 2026-11-13; source updated 2026-11-13

Revision: 8252f567704d2655af35c934cbd3db8685457390047bffb8e13ad5ff2953e632

Canonical: https://y2.dev/cve/CVE-2026-109091

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