Unrated severityOSV Advisory· Published Jan 14, 2026· Updated Jan 14, 2026
FreeRDP RDPGFX ResetGraphics race leads to use-after-free in SDL client (sdl->primary)
CVE-2026-22851
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.
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Affected products
6- osv-coords4 versionspkg:rpm/opensuse/freerdp&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/freerdp&distro=openSUSE%20Tumbleweedpkg:rpm/suse/freerdp&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7pkg:rpm/suse/freerdp&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7
< 3.22.0-160000.1.1+ 3 more
- (no CPE)range: < 3.22.0-160000.1.1
- (no CPE)range: < 3.20.2-1.1
- (no CPE)range: < 3.10.3-150700.3.3.1
- (no CPE)range: < 3.10.3-150700.3.3.1
Patches
Vulnerability mechanics
References
2- github.com/FreeRDP/FreeRDP/releases/tag/3.20.1mitrex_refsource_MISC
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g87-6pvc-wh99mitrex_refsource_CONFIRM
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