Security update for the Linux Kernel (Live Patch 28 for SLE 12) (important)

This update for the Linux Kernel 3.12.61-52_101 fixes several issues.

The following security issues were fixed:

• CVE-2017-16939: The XFRM dump policy implementation in
  net/xfrm/xfrm_user.c allowed local users to gain privileges or cause a
  denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt
  system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages
  (bsc#1069708).
• CVE-2017-15649: net/packet/af_packet.c allowed local users to gain
  privileges via crafted system calls that trigger mishandling of
  packet_fanout data structures, because of a race condition (involving
  fanout_add and packet_do_bind) that leads to a use-after-free
  (bsc#1064392).