Debian fixed the following issue in vzctl:
It was discovered that vzctl, a set of control tools for the OpenVZ server virtualisation solution, determined the storage layout of containers based on the presense of an XML file inside the container. An attacker with local root privileges in a simfs-based container could gain control over ploop-based containers. Further information on the prerequites of such an attack can be found at:
Created vzctl tracking bugs for this issue:
Affects: fedora-all [bug 1263127]
FYI, a CVE was requested directly to MITRE CVE assignment team for this. It was assigned CVE-2015-6927.
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.