LXD has two types of releases:

• Monthly feature releases
• LTS releases

For feature releases, only the latest one is supported, and we usually don't do point releases. Instead, users are expected to wait until the next monthly release.

For LTS releases, we do periodic bugfix releases that include an accumulation of bugfixes from the feature releases. Such bugfix releases do not include new features.

We don't consider privileged containers to be root safe, so any exploit allowing someone to escape them will not qualify as a security issue. This doesn't mean that we're not interested in preventing such escapes, but we simply do not consider such containers to be root safe.

Unprivileged container escapes are certainly something we'd consider a security issue, especially if somehow facilitated by LXD.

See the Ubuntu Security disclosure and embargo policy for information about how to contact the Ubuntu Security Team, what you can expect when you contact us, and what we expect from you.