All vulnerabilities
CVE-2026-94283

Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser

x.org libX11
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.8.14Fixed versionCVE List
Published28 Sep 2026Updated 30 Sep 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Text from CVE List

Affected versions 1

  • libX11affected: all versions before 1.8.14CVE List

References 1