Red Hat Security Advisory 2016-2766-01 – The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that stacking a file system over procfs in the Linux kernel could lead to a kernel stack overflow due to deep nesting, as demonstrated by mounting ecryptfs over procfs and creating a recursion by mapping /proc/environ. An unprivileged, local user could potentially use this flaw to escalate their privileges on the system.