CVE-2026-22856

HighCVSS 8.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-362 CWE-416

Affected software

Vendor	Product	Versions
FreeRDP	FreeRDP	< 3.20.1

References

https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1Release Notes
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhvExploit, Patch, Vendor Advisory

Timeline

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

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