Race condition in the sctp_wait_for_sndbuf function in net/sctp/socket.c in the Linux kernel before 4.9.11 allows local users to cause a denial of service (assertion failure and panic) via a multithreaded application that peels off an association in a certain buffer-full state.
https://access.redhat.com/errata/RHSA-2017:1308
https://bugzilla.redhat.com/show_bug.cgi?id=1420276
https://github.com/torvalds/linux/commit/2dcab598484185dea7ec22219c76dcdd59e3cb90
http://www.debian.org/security/2017/dsa-3804
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.11