Bug 2550517 (CVE-2026-109945)

Summary: CVE-2026-109945 freerdp: FreeRDP 3.0.0 before 3.32.0 Smartcard Use-After-Free via Concurrent Disconnect and Transmit
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 or compromised Remote Desktop Protocol (RDP) server can trigger a Denial of Service (DoS) by crashing the connecting client application. When a user connects to a server with smartcard emulation enabled, the server can issue concurrent disconnect and transmit requests for the same smartcard handle. This race condition leads to a use-after-free condition where memory is accessed after being released, causing memory corruption and terminating the client process.
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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: 2562577    
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Description OSIDB Bzimport 2026-10-13 13:52:24 UTC
FreeRDP 3.0.0 before 3.32.0 contains a heap use-after-free vulnerability in smartcard emulation when SCARD_IOCTL_DISCONNECT and SCARD_IOCTL_TRANSMIT operate concurrently on one card handle. A malicious RDP server can overlap these IRPs through separate context workers to free and reuse the SCardHandle, causing client-process heap corruption and termination.