CVE-2026-22851: Freerdp

Medium severity, CVSS 5.9. EPSS: 0.3% chance of exploitation in the next 30 days.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race condition between the RDPGFX dynamic virtual channel thread and the SDL render thread leads to a heap use-after-free. Specifically, an escaped pointer to sdl->primary (SDL_Surface) is accessed after it has been freed during RDPGFX ResetGraphics handling. This vulnerability is fixed in 3.20.1.

Affected products

• Freerdp Freerdp: before 3.20.1 (fixed in 3.20.1)

Published 2026-01-14. Last modified 2026-06-17.