Assume that you install Cumulative Update 1 for SQL Server 2012 Service Pack 3. When you execute queries that contain CHANGETABLE functions, CPU usage might increase significantly.
This issue is fixed in Cumulative Update 5 for SQL Server 2012 Service Pack 3.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.