X.Org X Server and Xwayland Use-After-Free Vulnerability in X11 Present Extension Handling

A use-after-free vulnerability has been identified in the X.Org X server and Xwayland. This issue arises in the X11 Present extension when processing notifications related to presentation events. Improper error handling can create dangling pointers, leading to a use-after-free condition. As a result, memory corruption or crashes may occur, with the potential for an attacker to execute arbitrary code or cause a denial-of-service condition. This vulnerability has existed since Xorg version 1.15.

Impact

Exploitation of this vulnerability can result in memory corruption or a crash, with the potential for arbitrary code execution. Additionally, the vulnerability can cause a denial-of-service condition by crashing the application or causing it to exit or restart.