All vulnerabilities
CVE-2026-93544

Out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing

x.org libXi
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.24%Chance of exploitation activity in the next 30 days, higher than 14% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.8.4Fixed versionCVE List
Published24 Sep 2026Updated 24 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 in libXi's XI2 XIQueryDevice reply parsing in libXi before 1.8.4 can be used by a malicious X server to crash an attached X client.

Text from CVE List

Affected versions 1

  • libXiaffected: all versions before 1.8.4CVE List

References 1