When you use Availability Group (AG) in SQL Server 2017 on Linux, an access violation (AV) occurs in sqlmin!AGHealthCompStateActual::GetData. Additionally, a dump file may be generated.
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: