Only the latest minor version of major versions supported in an Ubuntu LTS release receive security support. Backports to previous minor releases or other unsupported releases are made on a best-effort basis and will typically only be done for critical vulnerabilities.

This support tracks the Ubuntu LTS release cycle. The most recent major version will always support Ubuntu LTS series still in their regular maintenance lifecycle. When a major Starcraft release drops support for an Ubuntu LTS series, the previous major release remains supported for only the dropped LTS series until the end of its extended support lifecycle.

Once an LTS release of Ubuntu is sunset, new security fixes for this software will no longer be provided.

To report a security issue, file a Private Security Report with a description of the issue, the steps you took to create the issue, affected versions, and, if known, mitigations for the issue.

The Ubuntu Security disclosure and embargo policy contains more information about what you can expect when you contact us and what we expect from you.