description: 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.
problem types: CWE-416
affected:
{
vendor: n/a
product: xorg-server
versions:
version: xorg-server 21.1.8, status: affected
}