CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2026-109903 X.Org Server XvQueryImageAttributes Negative Size Reply
High (7.8) in x.org. EPSS 0.2% estimated probability of exploitation activity in the next 30 days.
On this page
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.
Severity
- EPSS
- 0.2% estimated probability of exploitation activity in the next 30 days; 8th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-191 Integer Underflow (Wrap or Wraparound)
- Published
- Modified
- Assigned by
- suse (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-109903 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-109903?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-109903?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-109903 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Badge for a README or a site
An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:
[](https://cve.bz/cve/CVE-2026-109903)
HTML:
<a href="https://cve.bz/cve/CVE-2026-109903"><img src="https://cve.bz/cve/badge/CVE-2026-109903.svg" alt="CVE-2026-109903"></a>
Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| X.Org xwayland | before 24.1.15 |
| X.Org xorg-x11-server | before 21.1.26 |
Fix and patched versions
- SUSE, openSUSE, Alpaquita: fixed package versions per release
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13, 14 | xwayland, xorg-server | no fix listed | DEBIAN-CVE-2026-109903 |
| Ubuntu | 22.04:LTS, 24.04:LTS, 26.04:LTS and 1 more | xwayland, xorg-server | no fix listed | UBUNTU-CVE-2026-109903 |
| Ubuntu | Pro:14.04:LTS, Pro:20.04:LTS | xorg-server | no fix listed | UBUNTU-CVE-2026-109903 |
| Ubuntu | Pro:16.04:LTS | xorg-server, xorg-server-hwe-16.04 | no fix listed | UBUNTU-CVE-2026-109903 |
| Ubuntu | Pro:18.04:LTS | xorg-server, xorg-server-hwe-18.04 | no fix listed | UBUNTU-CVE-2026-109903 |
| SUSE | Linux Enterprise High Performance Computing 15 SP4-ESPOS, Linux Enterprise High Performance Computing 15 SP4-LTSS, Linux Enterprise Server 15 SP4-LTSS and 1 more | xorg-x11-server | 1.20.3-150400.38.80.1 | SUSE-SU-2026:5180-1 |
| SUSE | Linux Enterprise Server 12 SP5-LTSS, Linux Enterprise Server LTSS Extended Security 12 SP5 | xorg-x11-server | 1.19.6-10.117.1 | SUSE-SU-2026:5178-1 |
| openSUSE | Tumbleweed | xorg-x11-server | 21.1.25-2.1 | openSUSE-SU-2026:12534-1 |
| openSUSE | Tumbleweed | xwayland | 24.1.14-2.1 | openSUSE-SU-2026:12535-1 |
| Alpaquita | 23, 25, stream | xorg-server | 21.1.26-r0 | BELL-CVE-2026-109903 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; SUSE security data, CC BY 4.0; BellSoft's OSV database, MIT. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu · SUSE · openSUSE · Alpaquita.