net/sctp/sm_sideeffect.c in the Linux kernel before 4.3 does not properly manage the relationship between a lock and a socket, which allows local users to cause a denial of service (deadlock) via a crafted sctp_accept call.
https://github.com/torvalds/linux/commit/635682a14427d241bab7bbdeebb48a7d7b91638e
https://bugzilla.redhat.com/show_bug.cgi?id=1297389
https://access.redhat.com/errata/RHSA-2016:1341
https://access.redhat.com/errata/RHSA-2016:1301
https://access.redhat.com/errata/RHSA-2016:1277
http://www.ubuntu.com/usn/USN-2967-2
http://www.ubuntu.com/usn/USN-2967-1
http://www.ubuntu.com/usn/USN-2932-1
http://www.ubuntu.com/usn/USN-2931-1
http://www.ubuntu.com/usn/USN-2930-3
http://www.ubuntu.com/usn/USN-2930-2
http://www.ubuntu.com/usn/USN-2930-1
http://www.securityfocus.com/bid/80268
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.openwall.com/lists/oss-security/2016/01/11/4
http://www.debian.org/security/2016/dsa-3503
http://www.debian.org/security/2016/dsa-3448
http://rhn.redhat.com/errata/RHSA-2016-0715.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html