Multiple security issues were identified in the X.Org X11 libXtst runtime library, leading to the release of security fixes under CVE-2026-109088. The vulnerability affects versions prior to 1.2.4-4.oe2403sp1. The flaw does not impact confidentiality or integrity but can cause availability disruption. A patch is available in version 1.2.4-4.oe2403sp1.