(RHSA-2014:1872) Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

• A NULL pointer dereference flaw was found in the way the Linux kernel’s
  Stream Control Transmission Protocol (SCTP) implementation handled
  simultaneous connections between the same hosts. A remote attacker could
  use this flaw to crash the system. (CVE-2014-5077, Important)

This update also fixes the following bug:

• This update fixes several race conditions between PCI error recovery
  callbacks and potential calls of the ifup and ifdown commands in the tg3
  driver. When triggered, these race conditions could cause a kernel crash.
  (BZ#1142568)

All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.