Bug 2483480 (CVE-2026-44420)

Summary:	CVE-2026-44420 freerdp: FreeRDP: Arbitrary code execution and denial of service via heap-buffer-overflow
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A heap-buffer overflow vulnerability exists in the FreeRDP server's clipboard channel. A remote attacker can exploit this by sending a specially crafted message to the server, which can crash the service (Denial of Service) or potentially allow the attacker to execute arbitrary code.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2491679, 2491680, 2491678
Bug Blocks:

Description OSIDB Bzimport 2026-05-29 21:02:19 UTC

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.

Comment 3 errata-xmlrpc 2026-07-07 13:53:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

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

Comment 4 errata-xmlrpc 2026-07-27 02:42:15 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

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