Out-of-Bounds Read Vulnerability in libX11 Affects X Clients
CVE-2026-94284

5.5MEDIUM

Key Information:

Vendor

X.org

Status
Libx11
Vendor
CVE Published:
28 September 2026

What is CVE-2026-94284?

An out-of-bounds read vulnerability has been identified in the libX11 library's XIM trigger-key registration parser. Versions prior to 1.8.14 are susceptible to this issue, which allows malicious X servers to potentially crash the connected X clients. This vulnerability can lead to stability issues and service disruptions. It is essential for users and administrators to apply updates to safeguard against potential exploits.

Affected Version(s)

libX11 0 < 1.8.14

References

https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_re...
patch

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AISLE in partnership with Red Hat
.