The tcp_disconnect function in net/ipv4/tcp.c in the Linux kernel before 4.12 allows local users to cause a denial of service (__tcp_select_window divide-by-zero error and system crash) by triggering a disconnect within a certain tcp_recvmsg code path.
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=499350a5a6e7512d9ed369ed63a4244b6536f4f8
lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
www.debian.org/security/2017/dsa-3981
www.securityfocus.com/bid/100878
www.securitytracker.com/id/1039549
access.redhat.com/errata/RHSA-2017:2918
access.redhat.com/errata/RHSA-2017:2930
access.redhat.com/errata/RHSA-2017:2931
access.redhat.com/errata/RHSA-2017:3200
access.redhat.com/errata/RHSA-2018:2172
github.com/torvalds/linux/commit/499350a5a6e7512d9ed369ed63a4244b6536f4f8
www.mail-archive.com/netdev%40vger.kernel.org/msg186255.html