Race condition in the IPC object implementation in the Linux kernel through 4.2.3 allows local users to gain privileges by triggering an ipc_addid call that leads to uid and gid comparisons against uninitialized data, related to msg.c, shm.c, and util.c.
https://kc.mcafee.com/corporate/index?page=content&id=SB10146
https://github.com/torvalds/linux/commit/b9a532277938798b53178d5a66af6e2915cb27cf
https://bugzilla.redhat.com/show_bug.cgi?id=1268270
http://www.ubuntu.com/usn/USN-2792-1
http://www.ubuntu.com/usn/USN-2765-1
http://www.ubuntu.com/usn/USN-2764-1
http://www.ubuntu.com/usn/USN-2763-1
http://www.ubuntu.com/usn/USN-2762-1
http://www.ubuntu.com/usn/USN-2761-1
http://www.securitytracker.com/id/1034592
http://www.securitytracker.com/id/1034094
http://www.securityfocus.com/bid/76977
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.debian.org/security/2015/dsa-3372
http://rhn.redhat.com/errata/RHSA-2015-2636.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00032.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00030.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00009.html