CVE-2026-22856

HIGH

FreeRDP < 3.20.1 - Use-After-Free via Serial Channel IRP Thread Race

Title source: llm
STIX 2.1

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.

References (2)

Core 2
Core References
Exploit, Patch, Vendor Advisory x_refsource_confirm
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv

Scores

CVSS v3 8.1
EPSS 0.0029
EPSS Percentile 20.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-362 CWE-416
Status published
Products (1)
freerdp/freerdp < 3.20.1
Published Jan 14, 2026
Tracked Since Feb 18, 2026