Assume that you query the Query Store data in SQL Server 2017. When querying the Query Store data, you may receive an Access violation (AV) error. This error occurs due to the corruption of the compressed Showplan.xml file.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: