CVE-2026-23883

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, `xf_Pointer_New` frees `cursorPixels` on failure, then `pointer_free` calls `xf_Pointer_Free` and frees it again, triggering ASan UAF. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

The following products are affected by CVE-2026-23883 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-23883.

URL	Resource
https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/client/X11/xf_graphics.c#L312-L319
https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/client/X11/xf_graphics.c#L340
https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/pointer.c#L164-L174
https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qcrr-85qx-4p6x
https://nvd.nist.gov/vuln/detail/CVE-2026-23883
https://www.cve.org/CVERecord?id=CVE-2026-23883