Out-of-Bounds Read Vulnerability in libX11 for X Clients by The X.Org Foundation
CVE-2026-94283

6.5MEDIUM

Key Information:

Vendor

X.org

Status
Libx11
Vendor
CVE Published:
28 September 2026

What is CVE-2026-94283?

An out-of-bounds read vulnerability exists in the XIM (X Input Method) attribute parser of libX11, versions prior to 1.8.14. This flaw can be exploited by malicious X servers to potentially crash connected X clients, leading to service disruptions and loss of data. Users and administrators are advised to apply updates promptly to safeguard against potential exploitations.

Affected Version(s)

libX11 0 < 1.8.14

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AISLE in partnership with Red Hat
.