# CVE-2026-109903: X.Org Server XvQueryImageAttributes Negative Size Reply

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

A buffer overread caused by casting a negative integer to CARD32 in XvQueryImageAttributes in X.Org X Server before 21.1.26 and xwayland before 24.1.15 could be used to causes crashes by authenticated X clients.

## 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/a11d070e4ea78c6c97a7e88c57277d766cd9050b

## 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: Not available

- Weaknesses: CWE-191

## Exploit evidence

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

## References

- https://gitlab.freedesktop.org/xorg/xserver/-/commit/a11d070e4ea78c6c97a7e88c57277d766cd9050b (CNA: suse; patch)

- https://gitlab.freedesktop.org/xorg/xserver/-/commit/a11d070e4ea78c6c97a7e88c57277d766cd9050b (meissner@suse.de)

## Provenance

- CNA: suse: https://www.cve.org/CVERecord?id=CVE-2026-109903; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109903; retrieved 2026-11-13; source updated 2026-11-13

Revision: 6e9698812a6aaf8ed544d6b2a4adab7f2abb5b3a8d8c4403e8dc29833294cf5e

Canonical: https://y2.dev/cve/CVE-2026-109903

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