Bug 2438207 (CVE-2026-23948)

Summary: CVE-2026-23948 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
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 null pointer dereference has been discovered in FreeRDP. A NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2438258, 2438299, 2438309, 2438285, 2438301    
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Description OSIDB Bzimport 2026-02-09 20:01:58 UTC
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.