Operational Defect Database
BugZero found this defect 1308 days ago.
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Microsoft SQL Server | 10921835
KB4046065 - FIX: Memory corruption occurs during Availability Group failovers for DTC transactions in SQL Server 2017 - Microsoft Support
Last update date:
7/21/2023
Affected products:
SQL Server 2017 on Windows (all editions)
Affected releases:
build lower than 14.0.3006.16
Fixed releases:
14.0.3006.16
Description:
Symptoms
Consider the following scenario: You have an AlwaysOn Availability Group (AG) in SQL Server 2017 with database Distributed Transaction Coordinator (DTC) support enabled. During Availability Group failovers, SQL Server internal DTC State for all the databases in the AG is first stopped, and then all the active transactions for all the databases of this availability group are killed. However, before the active transactions are killed, if these transactions try to access the stopped DTC State, a memory corruption may occur. This happens because the transactions are trying to access the memory that has already been deleted.
Resolution
This issue is fixed in the following cumulative update for SQL Server: Cumulative Update 1 for SQL Server 2017
