Bug 2550531 (CVE-2026-109951)

Summary: CVE-2026-109951 freerdp: FreeRDP 3.17.1 before 3.32.0 Heap Buffer Over-Read via Proxy DRDYNVC Channel Name
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
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Hardware: All   
OS: Linux   
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A flaw was found in FreeRDP. When handling dynamic virtual channel requests within the proxy component, the service does not properly verify that incoming channel names are null-terminated. A malicious backend Remote Desktop Protocol (RDP) server can exploit this issue by sending a specially crafted request, triggering an out-of-bounds heap read during string formatting. Successful exploitation can result in a Denial of Service (DoS) by crashing the proxy process or cause information disclosure by leaking heap memory into proxy logs.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2562593    
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Description OSIDB Bzimport 2026-10-13 13:57:09 UTC 
FreeRDP 3.17.1 before 3.32.0 contains a heap buffer over-read vulnerability in DynvcTrackerHandleCreateBack of the freerdp-proxy DRDYNVC channel handler that allows malicious backend RDP servers to read heap memory out of bounds. Attackers can send a CREATE_REQUEST_PDU whose channel name lacks a NUL byte, causing an unbounded snprintf read that leaks memory into proxy logs or crashes the process.