Bug 2570612 (CVE-2026-125394)

Summary: CVE-2026-125394 freerdp: FreeRDP: Information disclosure via stale brush cache use-after-free
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. A malicious Remote Desktop Protocol (RDP) server can exploit this use-after-free vulnerability by sending a crafted sequence of graphical drawing orders that reference invalidated brush cache data. As a result, the client reads freed memory from the heap, which may lead to information disclosure or a Denial of Service (DoS) caused by an application crash.
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: 2572403, 2572405    
Bug Blocks:    

Description OSIDB Bzimport 2026-11-10 20:10:29 UTC
FreeRDP before 3.33.0 contains a heap use-after-free vulnerability in update_gdi_patblt(), update_gdi_polygon_cb() and update_gdi_mem3blt() that retain stale brush cache pointers. A malicious RDP server can resend CACHE_BRUSH to the same slot then send PATBLT, causing clients to read freed heap memory, disclosing data or crashing.