Bug 2442756 (CVE-2026-25942)

Summary: CVE-2026-25942 freerdp: FreeRDP: Denial of Service via out-of-bounds read from malicious server input
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 malicious server can exploit this vulnerability by sending a specially crafted `execResult` value (7 or greater) to the client. This unchecked value is used to index an array, leading to an out-of-bounds read in the `xf_rail_server_execute_result` function. This can potentially cause a denial of service in the client application.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2442820, 2442836, 2442850, 2442833, 2442843    
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Description OSIDB Bzimport 2026-02-25 21:03:51 UTC
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_rail_server_execute_result` indexes the global `error_code_names[]` array (7 elements, indices 0–6) with an unchecked `execResult->execResult` value received from the server, allowing an out-of-bounds read when the server sends an `execResult` value of 7 or greater. Version 3.23.0 fixes the issue.