Multiple security vulnerabilities have been identified in Xwayland, the X server for running X clients under Wayland, including stack-based buffer overflows and use-after-free issues. These vulnerabilities affect versions prior to xwayland-24.1.12 and have been fixed in that release. The issues include a font alias stack buffer overflow, several XKB-related stack buffer overflows, and multiple use-after-free vulnerabilities in XSYNC components. The vulnerabilities have a high severity with a CVSS score of 7.8, impacting confidentiality, integrity, and availability. A security update is available in xorg-x11-server-Xwayland-22.1.2-38.oe2203sp4. No known exploits in the wild have been reported.