mysql-8.0 regression

A security issue affects these releases of Ubuntu and its
derivatives:

* Ubuntu 20.04 LTS

Summary

USN-4441-1 introduced a regression in MySQL

Software Description

* mysql-8.0 - MySQL database

Details

USN-4441-1 fixed vulnerabilities in MySQL. The new upstream
version changed compiler options and caused a regression in
certain scenarios. This update fixes the problem.

Original advisory details:

Multiple security issues were discovered in MySQL and this update
includes new upstream MySQL versions to fix these issues.

MySQL has been updated to 8.0.21 in Ubuntu 20.04 LTS. Ubuntu 16.04
LTS and Ubuntu 18.04 LTS have been updated to MySQL 5.7.31.

In addition to security fixes, the updated packages contain bug
fixes, new features, and possibly incompatible changes.

Please see the following for more information:

https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-31.html

https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-21.html

https://www.oracle.com/security-alerts/cpujul2020.html

Update instructions

The problem can be corrected by updating your system to the
following package versions:

Ubuntu 20.04 LTS
mysql-server-8.0 - 8.0.21-0ubuntu0.20.04.4

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary
changes.

References

* USN-4441-1
* LP: 1889851

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