Answer in brief
CVE-2026-109903 records a High severity (CVSS 7.8) vulnerability in X.Org Server XvQueryImageAttributes Negative Size Reply. The current sources do not mark it as known exploited. The current feed maps X.Org/xorg-x11-server (generic), X.Org/xwayland (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps X.Org/xorg-x11-server (generic), X.Org/xwayland (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| X.Org/xorg-x11-servergeneric | >=0 <21.1.26 | 21.1.26 |
| X.Org/xwaylandgeneric | >=0 <24.1.15 | 24.1.15 |
Published upstream
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 13, 2026
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.
Quoted source text, attributed separately from HOL analysis.