To report a containerd vulnerability, send an email to [email protected] detailing the issue and steps to reproduce. The reporter(s) can expect a response within 24 hours acknowledging the issue was received. If a response is not received within 24 hours, please reach out to any committer directly to confirm receipt of the issue.

Once a committer has confirmed the relevance of the report, a draft security advisory will be created on Github. The draft advisory will be used to discuss the issue with committers, the reporter(s), and containerd's security advisors. If the reporter(s) wishes to participate in this discussion, then provide reporter Github username(s) to be invited to the discussion. If the reporter(s) does not wish to participate directly in the discussion, then the reporter(s) can request to be updated regularly via email.

If the vulnerability is accepted, a timeline for developing a patch, public disclosure, and patch release will be determined. If there is an embargo period on public disclosure before the patch release, an announcment will be sent to the security announce mailing list([email protected]) announcing the scope of the vulnerability, the date of availability of the patch release, and the date of public disclosure. The reporter(s) are expected to participate in the discussion of the timeline and abide by agreed upon dates for public disclosure.

See the containerd releases page for information on supported versions of containerd. Any Extended or Active release branch may receive security updates. For any security issues discovered on older versions, non-core packages, or dependencies, please inform committers using the same security mailing list as for reporting vulnerabilities.

Any organization or individual who directly uses containerd and non-core packages in production or in a security critical application is eligible to join the security announce mailing list. Indirect users who use containerd through a vendor are not expected to join, but should request their vendor join. To join the mailing list, the individual or organization must be sponsored by either a containerd committer or security advisor as well as have a record of properly handling non-public security information. If a sponsor cannot be found, sponsorship may be requested at [email protected]. Sponsorship should not be requested via public channels since membership of the security announce list is not public.