Symptoms
Assume that you use Microsoft SQL Server 2016 and 2017 service broker to send messages from one instance to another instance. When you send an Extensible Markup Language (XML) message with an image through a service broker, the session hangs.
This problem occurs because the service broker calls incorrect XML schema validation Application Programming Interface (API).
Resolution
This issue is fixed in the following cumulative updates for SQL Server:
Cumulative Update 4 for SQL Server 2017
Cumulative Update 6 for SQL Server 2016 SP1
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:
Latest cumulative update for SQL Server 2017
Latest cumulative updates for SQL Server 2016
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.