Bug 2533958 (CVE-2026-91958)

Summary: CVE-2026-91958 FreeRDP: FreeRDP: Denial of service and potential code execution via malicious RDP file
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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. This vulnerability allows a remote attacker to trigger out-of-bounds memory access by crafting a malicious Remote Desktop Protocol (RDP) connection file. When a user opens this file, the FreeRDP client fails to properly validate array values, leading to a heap buffer overflow. This can result in a denial of service, causing the application to crash, and potentially lead to information disclosure or arbitrary code execution.
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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 2026-09-15 15:52:13 UTC
FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files, allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in xfreerdp.