fs/pipe.c in the Linux kernel before 4.5 does not limit the amount of unread data in pipes, which allows local users to cause a denial of service (memory consumption) by creating many pipes with non-default sizes.
https://github.com/torvalds/linux/commit/759c01142a5d0f364a462346168a56de28a80f52
https://bugzilla.redhat.com/show_bug.cgi?id=1313428
http://www.ubuntu.com/usn/USN-2967-2
http://www.ubuntu.com/usn/USN-2967-1
http://www.ubuntu.com/usn/USN-2949-1
http://www.ubuntu.com/usn/USN-2948-2
http://www.ubuntu.com/usn/USN-2948-1
http://www.ubuntu.com/usn/USN-2947-3
http://www.ubuntu.com/usn/USN-2947-2
http://www.ubuntu.com/usn/USN-2947-1
http://www.ubuntu.com/usn/USN-2946-2
http://www.ubuntu.com/usn/USN-2946-1
http://www.securityfocus.com/bid/83870
http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.openwall.com/lists/oss-security/2016/03/01/3
http://www.debian.org/security/2016/dsa-3503
http://rhn.redhat.com/errata/RHSA-2017-0217.html
http://rhn.redhat.com/errata/RHSA-2016-2584.html
http://rhn.redhat.com/errata/RHSA-2016-2574.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00059.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00060.html