Bug 2442751 (CVE-2026-25954)

Summary: CVE-2026-25954 freerdp: FreeRDP: Use-after-free vulnerability leading to denial of service
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP). A remote attacker could exploit a use-after-free vulnerability in the `xf_rail_server_local_move_size` function. This occurs because the `xf_rail_get_window` function returns an unprotected pointer, allowing a main thread to concurrently delete a window while another thread is still using its pointer. Successful exploitation of this flaw could lead to a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2442823, 2442829, 2442835, 2442826, 2442832    
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Description OSIDB Bzimport 2026-02-25 21:03:08 UTC 
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_rail_server_local_move_size` dereferences a freed `xfAppWindow` pointer because `xf_rail_get_window` returns an unprotected pointer from the `railWindows` hash table, and the main thread can concurrently delete the window (via a window delete order) while the RAIL channel thread is still using the pointer. Version 3.23.0 fixes the issue.