CVE-2026-44420

FreeRDP cliprdr server heap-buffer-overflow via undersized capabilitySetLength in CB_CLIP_CAPS

Published: May 29, 2026Updated: Jul 27, 2026 Sources: CVE List NVD BDUCWE-122

8.8HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-122 CWE-131

Affected Products

FreeRDP

oss-project·US

FreeRDP

OSS Libraries

Free Software Foundation, Inc.

oss-project·USaka free software foundation, fsf

FreeRDP

OSS Libraries

and 1 more affected products View all →

Exploitability

Official Patch Available

Workaround Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

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References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mvpx-xj7r-3p3r

github.com

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

access.redhat.com

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

access.redhat.com

and 4 more references View all →

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