Check the version of cgmanager
Please Install the Updated Packages.
Serge Hallyn discovered that cgmanager did not consistently enforce proper nesting when modifying cgroup properties. A local attacker in a privileged container could use this to set cgroup values for all cgroups.
cgmanager on Ubuntu 14.10 , Ubuntu 14.04 LTS
Get the installed version with the help of detect NVT and check if the version is vulnerable or not.