CVE-2026-22856

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1	Release Notes
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

History

17 Jun 2026, 10:20

Type	Values Removed	Values Added
Summary		(es) FreeRDP es una implementación gratuita del Protocolo de Escritorio Remoto. Antes de la versión 3.20.1, una condición de carrera en el seguimiento de hilos IRP del canal serie permite un uso de memoria después de liberación (use-after-free) en el heap cuando un hilo elimina una entrada de serial->IrpThreads mientras otro la lee. Esta vulnerabilidad está corregida en la versión 3.20.1.

20 Jan 2026, 18:35

Type	Values Removed	Values Added
References	~~() https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1 -~~	() https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1 - Release Notes
References	~~() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv -~~	() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv - Exploit, Patch, Vendor Advisory
CPE		cpe:2.3:a:freerdp:freerdp::::::::
First Time		Freerdp Freerdp freerdp
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.1

14 Jan 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-14 18:16

Updated : 2026-06-17 10:20

NVD link : CVE-2026-22856

Mitre link : CVE-2026-22856

CVE.ORG link : CVE-2026-22856

JSON object : View

Products Affected

freerdp

freerdp

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-416

Use After Free

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