CVE-2026-94285: X.org LIBX11

Medium severity, CVSS 5.1. EPSS: 0.1% chance of exploitation in the next 30 days.

An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Affected products

• X.org LIBX11: before 1.8.14 (fixed in 1.8.14)

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