CVE-2023-1393 (fedora, xorg-server)

A flaw was found in X.Org Server Overlay Window. A Use-After-Free may lead to local privilege escalation. If a client explicitly destroys the compositor overlay window (aka COW), the Xserver would leave a dangling pointer to that window in the CompScreen structure, which will trigger a use-after-free later.

client cow cve escalation fedora flaw free local local privilege escalation may org overlay privilege privilege escalation server trigger use-after-free x.org