Docker Engine before 1.8.3 and CS Docker Engine before 1.6.2-CS7 does not properly validate and extract the manifest object from its JSON representation during a pull, which allows attackers to inject new attributes in a JSON object and bypass pull-by-digest validation.
lists.opensuse.org/opensuse-security-announce/2015-10/msg00014.html
lists.opensuse.org/opensuse-updates/2015-10/msg00036.html
blog.docker.com/2015/10/security-release-docker-1-8-3-1-6-2-cs7/
github.com/docker/docker/blob/master/CHANGELOG.md
groups.google.com/forum/
www.docker.com/legal/docker-cve-database