CVE-2026-22851
MEDIUMFreeRDP < 3.20.1 - Use-After-Free via RDPGFX ResetGraphics Handling
Title source: llmDescription
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.
References (2)
Core 2
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g87-6pvc-wh99
Release Notes x_refsource_misc
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
Scores
CVSS v3
5.9
EPSS
0.0025
EPSS Percentile
15.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-362
CWE-416
Status
published
Products (1)
freerdp/freerdp
< 3.20.1
Published
Jan 14, 2026
Tracked Since
Feb 18, 2026