CVE-2026-44420

High

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, a malicious RDP client can trigger a heap-buffer-overflow write in FreeRDP's server-side clipboard (cliprdr) channel by sending a CB_CLIP_CAPS PDU with a too-small capabilitySetLength. This can crash the server process (remote DoS) and may be exploitable for code execution because it corrupts heap memory. This vulnerability is fixed in 3.26.0.

SeverityHigh

CVSS8.8

Exploit probability—

ProductFreerdp

PublishedMay 29, 2026

First seenMay 29, 2026

Weakness typeCWE-122CWE-122

How to fix

Update

freerdp freerdp3.26.0 or later

Vendor advisories

access.redhat.com/errata/RHSA-2026:46393
access.redhat.com/errata/RHSA-2026:36203

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.26.0	3.26.0

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