https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2016/servicepack2-cumulativeupdate16
Cumulative update 16 for SQL Server 2016 SP2 (KB5000645) - SQL Server | Microsoft Learn
This article contains the summary, known issues, improvements, fixes and other information for SQL Server 2016 SP2 cumulative update 16 (KB5000645).
cumulative updatesql server