CVE-2026-22856

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.

• https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1

  security-advisories@github.com
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv

  security-advisories@github.com