Use After Free Vulnerability in FreeRDP Remote Desktop Protocol Implementation

CVE-2026-24683

What is CVE-2026-24683?

The FreeRDP implementation of the Remote Desktop Protocol contains a vulnerability that arises from inadequate synchronization in input event handling. Specifically, the 'ainput_send_input_event' function caches a callback in a local variable and later utilizes it without proper synchronization mechanisms. If a concurrent channel closure occurs, it can lead to the callback being freed or reinitialized, resulting in a use after free condition. This vulnerability was addressed in version 3.22.0, ensuring that input handling is secure and properly synchronized.

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References