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The Update Bureau
Security

KB5034123: all 35 vulnerabilities

Cumulative update for Windows 11, version 23H2, January 2024. The update page explains it and lists only the exploited, publicly disclosed and critical vulnerabilities; here are all of them, most severe first.

Vulnerabilities fixed

35 vulnerabilities fixed
2 critical 33 important
VulnerabilitySeverityCVSS
Windows Kerberos Security Feature Bypass Vulnerability
Critical 8.8
Windows Hyper-V Remote Code Execution Vulnerability
Critical 7.5
Windows HTML Platforms Security Feature Bypass Vulnerability
Important 8.1
Microsoft ODBC Driver Remote Code Execution Vulnerability
Important 8.0
Microsoft Common Log File System Elevation of Privilege Vulnerability
Important 7.8
Microsoft Virtual Hard Disk Elevation of Privilege Vulnerability
Important 7.8
Windows Subsystem for Linux Elevation of Privilege Vulnerability
Important 7.8
Windows Cryptographic Services Remote Code Execution Vulnerability
Important 7.8
Win32k Elevation of Privilege Vulnerability
Important 7.8
Windows Kernel Elevation of Privilege Vulnerability
Important 7.8
Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
Important 7.8
Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
Important 7.8
Microsoft Message Queuing (MSMQ) Denial of Service Vulnerability
Important 7.5
Microsoft AllJoyn API Denial of Service Vulnerability
Important 7.5
Remote Desktop Client Remote Code Execution Vulnerability
Important 7.5
Windows libarchive Remote Code Execution Vulnerability
Important 7.3
Windows libarchive Remote Code Execution Vulnerability
Important 7.3
Windows Group Policy Elevation of Privilege Vulnerability
Important 7.0
BitLocker Security Feature Bypass Vulnerability
Important 6.6
Microsoft Message Queuing Information Disclosure Vulnerability
Important 6.5
Windows Message Queuing Client (MSMQC) Information Disclosure
Important 6.5
Microsoft Message Queuing Information Disclosure Vulnerability
Important 6.5
Windows Message Queuing Client (MSMQC) Information Disclosure
Important 6.5
Windows Nearby Sharing Spoofing Vulnerability
Important 6.5
Microsoft Message Queuing Information Disclosure Vulnerability
Important 6.5
Windows Themes Spoofing Vulnerability
Important 6.5
Windows Server Key Distribution Service Security Feature Bypass
Important 6.1
Microsoft Local Security Authority Subsystem Service Information Disclosure Vulnerability
Important 5.7
Microsoft Bluetooth Driver Spoofing Vulnerability
Important 5.7
Windows CoreMessaging Information Disclosure Vulnerability
Important 5.5
Windows Hyper-V Denial of Service Vulnerability
Important 5.5
Windows Cryptographic Services Information Disclosure Vulnerability
Important 5.5
Windows TCP/IP Information Disclosure Vulnerability
Important 5.3
Windows Themes Information Disclosure Vulnerability
Important 4.7
Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability
Important 4.4