MySQL Crashing (on some servers) After Upgrade to 8.0.38

We have identified that MySQL crashed on some servers following the recent upgrade to version 8.0.38. Errors seen in logs:

mysqld.service: Main process exited, code=killed, status=11/SEGV
Most likely, you have hit a bug, but this error can also be caused by malfunctioning hardware.

To mitigate this issue, please follow the steps below:

1. Rollback the Upgrade:
   • You can downgrade MySQL using the command
     yum downgrade mysql-community*

    

2. Version Lock MySQL 8.0.37:
   • Lock MySQL to version 8.0.37 until further updates in this regard from MySQL or cPanel.

Here is the procedure to version lock:

1. Install version lock:
   dnf install python3-dnf-plugin-versionlock
2. Lock the MySQL version:
   yum versionlock mysql*

For detailed instructions, please refer to the official guide: How to version lock RPM packages.

cPanel has now published an official update on this issue
https://support.cpanel.net/hc/en-us/articles/24546938662039-Upstream-issue-MySQL-8-0-38-does-not-start-Segmentation-Fault

Additional Notes:

• To check mysql version on the server: mysql -V
• In case sites have an issue even after the downgrade, you may need to rebuild Apache.