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No exploitation reportedAwaiting NVD analysis

CVE-2026-109092

X.Org Server XvShmPutImage Shared-Memory Bounds Overflow

No exploitation reported by the sources we read.

  • Published2026-11-13
  • WeaknessCWE-191

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Incorrectly handled negative sizes when processing ProcXvShmPutImage requests in the X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by local authenticated X clients to crash the X server or execute code.

Timeline

dates in UTC
  1. 2026-11-1315:00CVE publishedCNA

Versions per branch

Products declared by the CNA2 products

As suse, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-13

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • xorg-serverUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • xorg-serverUbuntu:Pro:18.04:LTSall versions · no fixed version listedand 1 other package
  • xorg-serverUbuntu:Pro:16.04:LTSall versions · no fixed version listedand 1 other package
  • xorg-serverUbuntu:Pro:14.04:LTSall versions · no fixed version listed
  • xwaylandUbuntu:26.10all versions · no fixed version listedand 1 other package
  • xwaylandUbuntu:26.04:LTSall versions · no fixed version listedand 1 other package
  • xwaylandUbuntu:24.04:LTSall versions · no fixed version listedand 1 other package
  • xwaylandUbuntu:22.04:LTSall versions · no fixed version listedand 1 other package

3 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.82026-11-13
  • CNAweakness (CWE)CWE-1912026-11-13
  • NVDweakness (CWE)CWE-191read 2026-11-13
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-13
Last Modified
2026-11-13
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-9g9p-hq24-fh34

Frequently asked questions

What is CVE-2026-109092?

Incorrectly handled negative sizes when processing ProcXvShmPutImage requests in the X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by local authenticated X clients to crash the X server or execute code.

Is CVE-2026-109092 actively exploited?

Active exploitation of CVE-2026-109092 has not been confirmed.

What is the CVSS score for CVE-2026-109092?

CVE-2026-109092 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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