March 12, 2024—KB5035857 (OS Build 20348.2340)

NEW 3/22/24 IMPORTANT If you plan to install this update on a domain controller (DC), we highly recommend that you install KB5037422 instead (March 22, 2024). This out-of-band update addresses a known issue that affects the Local Security Authority Subsystem Service (LSASS). It might leak memory on DCs.

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows Server 2022, see its update history page. NoteFollow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.

Improvements

This security update includes quality improvements. When you install this KB:

• The update affects Active Directory domains that host mobile device management (MDM) providers. They can transition from “Compatibility mode” to the strong certificate mapping “Enforcement mode.” To do this, they can allow an Active Directory Key Distribution Center (KDC) to read user security identifiers (SID) from the Subject Alternative Name (SAN). Then, the providers can populate those values. To learn more, see:
  • KB5014754: Certificate-based authentication changes on Windows domain controllers
  • Preview of SAN URI for Certificate Strong Mapping for KB5014754
  • CVE-2022-34691,CVE-2022-26931, and CVE-2022-26923
• This update addresses an issue that affects the touch keyboard. It might not show during out-of-box experience (OOBE).
• This update addresses an issue that makes the troubleshooting process fail. This occurs when you use the Get Help app.
• This update addresses an issue that affects Remote Desktop Web Authentication. You might not be able to connect to sovereign cloud endpoints.
• This update affects HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders. Your device can now set and maintain the correct default permissions.
• This update addresses a memory allocation issue in the Host Network Service (HNS). It causes high memory usage. It also affects service and pod deployment.
  If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.For more information about security vulnerabilities, please refer to the Security Update Guide and the March 2024 Security Updates.

Windows Server 2022 servicing stack update - 20348.2334

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

Known issues in this update

Extreme memory leaks may cause LSASS to crash, which triggers an unscheduled reboot of underlying domain controllers (DCs).| This issue is addressed in KB5037422.

How to get this update

If you want to remove the LCUTo remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command:DISM /online /get-packages.Running Windows Update Standalone Installer (wusa.exe) with the**/uninstall **switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

File InformationFor a list of the files that are provided in this update, download the file information for cumulative update 5035857. For a list of the files that are provided in the servicing stack update, download the file information for the SSU - version 20348.2334.