Microsoft confirms that there is a bug in the March Patch Tuesday update for Windows Server. This memory problem causes servers to restart unexpectedly or freeze. The bug is in all modern versions of the software. Microsoft says it is working on a solution.
Microsoft confirms on a support page that problems arose after the March Patch Tuesday update round. According to the company, update KB5035857 contains a problem for various versions of Windows Server. This concerns Windows Server 2012 R2, 2016, 2019 and 2022. Last week, several system administrators complained online about problems in the server OS after installing the update.
It now appears that it is indeed a bug that is related to the update. According to Microsoft, a memory leak may occur in the Local Security Authority Subsystem Service or Lsass of Windows Server if it is installed on a domain controller. This happens when both on-prem and cloud-based domain controllers with Active Directory make an authentication request via Kerberos. Due to 'an extreme memory leak', Lsass may crash. This causes the domain controller to restart, Microsoft says, although many administrators also report that the DCs also freeze.
Microsoft says it has found the root cause, although the company provides few further details. “We are working on a solution that will be available in the coming days,” the company wrote.
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