Search: CVE-2026-50259

CVE-2026-50259 is a stack-based buffer overflow vulnerability in the X.Org X server and Xwayland components of Red Hat Enterprise Linux 10. The flaw occurs in the _XkbSetMapChecks() function, where a fixed-size stack buffer is indexed by a client-controlled value, allowing a buffer overflow. This vulnerability can lead to a server crash or privilege escalation if the X server runs with root privileges. Red Hat has issued a security advisory with patches addressing this and related vulnerabilities in the xorg-x11-server and xorg-x11-server-Xwayland packages.