Microsoft is looking into LSASS memory leaks (caused by Windows Server updates released during the November Patch Tuesday) that may result in domain controller freezes and restarts. LSASS (Local Security Authority Subsystem Service) is in charge of enforcing security policies on Windows systems and managing access tokens, password changes, and user logins.
If this service fails, logged-in users lose access to their Windows accounts on the machine and are presented with a system restart error followed by a system reboot.
“LSASS might use more memory over time and the DC might become unresponsive and restart,” Microsoft explains on the Windows Health dashboard.
“Depending on the workload of your DCs and the amount of time since the last restart of the server, LSASS might continually increase memory usage with the uptime of your server and the server might become unresponsive or automatically restart.”
Out-of-band Windows updates pushed out to address authentication issues on Windows domain controllers may also be affected by this known issue, according to Redmond. Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2 SP1, and Windows Server 2008 SP2 are all affected. Microsoft is working on a soluti
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