Answer in brief
CVE-2024-21885 records a High severity (CVSS 7.8) vulnerability in Xorg-x11-server: heap buffer overflow in xisenddevicehierarchyevent. The current sources do not mark it as known exploited. The current feed maps xorg-server (generic), 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 xorg-server (generic), xwayland (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| xorg-servergeneric | >=0 <21.1.11 | 21.1.11 |
| xwaylandgeneric | >=0 <23.2.4 | 23.2.4 |
Published upstream
Feb 28, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 4, 2026
A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution in SSH X11 forwarding environments.
Quoted source text, attributed separately from HOL analysis.