What’s Vulnerable › Vulnerabilities

CVE-2026-22851: FreeRDP RDPGFX ResetGraphics race leads to use-after-free in SDL client (sdl->primary)

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-14 · updated 2026-06-17
• Weakness: CWE-362

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.

Affected products

• FreeRDP: before 3.20.1 — fixed in 3.20.1

How to fix

Upgrade to a fixed version: FreeRDP 3.20.1. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g87-6pvc-wh99

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