CVE-2026-22851
Medium
Description
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductFreerdp
PublishedJan 14, 2026
First seenJan 14, 2026
Weakness typeCWE-362Race conditionCWE-416Use after free
How to fix
Update
- freerdp freerdp3.20.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freerdp freerdp | v < 3.20.1 | 3.20.1 |
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