The Linux kernel before 4.5 allows local users to bypass file-descriptor limits and cause a denial of service (memory consumption) by leveraging incorrect tracking of descriptor ownership and sending each descriptor over a UNIX socket before closing it. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-4312.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=415e3d3e90ce9e18727e8843ae343eda5a58fad6
www.debian.org/security/2016/dsa-3503
www.openwall.com/lists/oss-security/2016/02/23/2
www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
www.ubuntu.com/usn/USN-2946-1
www.ubuntu.com/usn/USN-2946-2
www.ubuntu.com/usn/USN-2947-1
www.ubuntu.com/usn/USN-2947-2
www.ubuntu.com/usn/USN-2947-3
www.ubuntu.com/usn/USN-2948-1
www.ubuntu.com/usn/USN-2948-2
www.ubuntu.com/usn/USN-2949-1
bugzilla.redhat.com/show_bug.cgi?id=1311517
github.com/torvalds/linux/commit/415e3d3e90ce9e18727e8843ae343eda5a58fad6