CVE-2026-22851

MediumCVSS 5.9/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-362CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Jan 14, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-22851: Medium severity, CVSS 5.9 | Vulnix