Bug 2509994 (CVE-2026-67301)

Summary: CVE-2026-67301 FreeRDP: FreeRDP: Memory disclosure or denial of service via crafted RDP update orders
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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 flaw was found in FreeRDP. When the `async-update` feature is enabled, a malicious or compromised Remote Desktop Protocol (RDP) server can send specially crafted update orders. This can lead to an out-of-bounds read, potentially exposing sensitive information or causing the client application to crash, resulting in a Denial of Service.
 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: 2511623, 2511624    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-01 13:02:16 UTC 
FreeRDP before 3.29.0 contains out-of-bounds read vulnerabilities in the async update message proxy for the PolygonSC and PolygonCB primary drawing orders. When AsyncUpdate is enabled (e.g., xfreerdp /async-update), update_message_PolygonSC() and update_message_PolygonCB() allocate a fresh points array but copy point data from the address of the order structure instead of from polygonSC->points / polygonCB->points, resulting in a client-side out-of-bounds read. A malicious or compromised RDP server sending crafted PolygonSC/PolygonCB update orders can trigger memory disclosure or a client crash.
Comment 2 errata-xmlrpc 2026-08-31 12:31:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:61379 https://access.redhat.com/errata/RHSA-2026:61379
Comment 3 errata-xmlrpc 2026-08-31 12:41:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:61378 https://access.redhat.com/errata/RHSA-2026:61378
Comment 4 errata-xmlrpc 2026-09-02 11:06:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62571 https://access.redhat.com/errata/RHSA-2026:62571