Bug 2565974 (CVE-2026-121390)

Summary: CVE-2026-121390 freerdp: freerdp: Denial of Service via malformed gateway response
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. A malicious remote gateway can cause a Denial of Service (DoS) by returning a crafted response that omits an expected server certificate field. FreeRDP fails to properly validate the missing field during Azure Active Directory (AAD) gateway communications, leading to an assertion failure that crashes the client process.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-03 17:11:43 UTC
FreeRDP 3.0.0 before 3.32.2 built with WITH_AAD=ON contains a reachable assertion because its ARM gateway response parser accepts a missing or non-string redirectedServerCert field and passes a null buffer to the certificate parser. A malicious or malformed user-selected gateway can return such a response to abort the client process.