Bug 2567740 (CVE-2026-121959)

Summary: CVE-2026-121959 freerdp: freerdp: Denial of Service via infinite loop on truncated WebSocket frame
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. A malicious Remote Desktop (RD) Gateway or network attacker can cause a Denial of Service (DoS) by sending a truncated WebSocket data frame followed by a Transport Layer Security (TLS) connection shutdown. Due to improper handling of the incomplete payload when the connection closes, the client enters an infinite loop, consuming excessive Central Processing Unit (CPU) resources until the application is terminated.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-11-05 22:22:25 UTC
FreeRDP before 3.32.2 contains an infinite loop vulnerability in websocket_context_read that fails to handle a zero BIO result with payload outstanding. A malicious RD Gateway can send a truncated WebSocket frame followed by a TLS close_notify, causing a client thread to spin and consume CPU until killed.