| Package | Affected versions | Patched versions |
|---|---|---|
| x server | < 21.1.8 | 21.1.8 |
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.
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