The RBAC functionality in grsecurity before 2.1.8 does not properly handle when the admin role creates a service and then exits the shell without unauthenticating, which causes the service to be restarted with the admin role still active.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24156
http://www.vupen.com/english/advisories/2006/0199
http://www.securityfocus.com/bid/16261