The key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 4.2.6 allows local users to cause a denial of service (OOPS) via crafted keyctl commands.
https://source.android.com/security/bulletin/2016-12-01.html
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05068676
https://github.com/torvalds/linux/commit/f05819df10d7b09f6d1eb6f8534a8f68e5a4fe61
https://github.com/torvalds/linux/commit/ce1fad2740c648a4340f6f6c391a8a83769d2e8c
https://bugzilla.redhat.com/show_bug.cgi?id=1272371
https://bugzilla.redhat.com/show_bug.cgi?id=1272172
http://www.ubuntu.com/usn/USN-2843-3
http://www.ubuntu.com/usn/USN-2843-2
http://www.ubuntu.com/usn/USN-2843-1
http://www.ubuntu.com/usn/USN-2840-2
http://www.ubuntu.com/usn/USN-2840-1
http://www.ubuntu.com/usn/USN-2829-2
http://www.ubuntu.com/usn/USN-2829-1
http://www.ubuntu.com/usn/USN-2826-1
http://www.ubuntu.com/usn/USN-2824-1
http://www.ubuntu.com/usn/USN-2823-1
http://www.securitytracker.com/id/1034472
http://www.securityfocus.com/bid/77544
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.openwall.com/lists/oss-security/2015/10/20/6
http://www.debian.org/security/2015/dsa-3396
http://rhn.redhat.com/errata/RHSA-2016-0224.html
http://rhn.redhat.com/errata/RHSA-2016-0212.html
http://rhn.redhat.com/errata/RHSA-2016-0185.html
http://rhn.redhat.com/errata/RHSA-2015-2636.html
http://marc.info/?l=bugtraq&m=145975164525836&w=2
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html