CVE-2026-94286: X.org Libxtst

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Affected products

• X.org Libxtst: before 1.2.6 (fixed in 1.2.6)

Published 2026-09-28. Last modified 2026-09-30.