Microsoft OOB Updates

Microsoft released an important Out-Of-Band (OOB) update yesterday, which is an emergency fix to be installed before the upcoming April updates, for Windows Server versions 2022, 2016, and 2012 (not yet available for the 2019 version).

This update fixes a know issue that was identified in the last update in March: the problem afflicts the Active Directory Domain Controllers’ LSASS service, where a memory leak during kerberos authentication requests can cause the service to crash and unexpectedly reboot the server.

Microsoft recommends installing the update immediately in case your system falls into the described case scenario.

https://learn.microsoft.com/en-us/windows/release-health/status-windows-server-2022#3271msgdesc

Below are the reference KBs for the specific versions:

Windows Server 2022: KB5037422
Windows Server 2019: KB5037425
Windows Server 2016: KB5037423
Windows Server 2012 R2: KB5037426

EDIT: The update for Windows Server 2019 was realeased yesterday.