The Reporting Bugs page on the Knowledge Base has details on how to report a bug.
The roadmap is visible on, along with estimated release dates. Each stable version receives bug-fixes and security fixes periodically. The current supported versions are: 10.2, 10.3, 10.4, 10.5, 10.6 and the development version is 10.7. On average, MariaDB Server has had one stable major release every year. MariaDB Foundation ensures that MariaDB Server has a steady cadence of releases. To help with automating downloads of MariaDB Server and related files, MariaDB Foundation has exposed a REST API.