An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the cachingsha2password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256cryptr uses alloca.

In MariaDB server version through 11.8.5, when server audit plugin is enabled with serverauditevents variable configured with QUERYDCL, QUERYDDL, or QUERYDML filtering, if an authenticated database user invokes a SQL statement prefixed with double-hyphen (—) or hash (#) style comments, the statement is not logged.