Description
* 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. (CVE-2016-1583, Important)
* It was reported that on s390x, the fork of a process with four page table
levels will cause memory corruption with a variety of symptoms. All processes
are created with three level page table and a limit of 4TB for the address
space. If the parent process has four page table levels with a limit of 8PB, the
function that duplicates the address space will try to copy memory areas outside
of the address space limit for the child process. (CVE-2016-2143, Moderate)