LXD has two types of releases:

• 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 feature 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.

The easiest way to report a security issue is through GitHub. See Privately reporting a security vulnerability for instructions.

The LXD GitHub admins will be notified of the issue and will work with you to determine whether the issue qualifies as a security issue and, if so, in which component. We will then handle figuring out a fix, getting a CVE assigned and coordinating the release of the fix to the various Linux distributions.

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.