(RHSA-2014:1025) Important: kernel security and bug fix update

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

• A flaw was found in the way the pppol2tp_setsockopt() and
  pppol2tp_getsockopt() functions in the Linux kernel’s PPP over L2TP
  implementation handled requests with a non-SOL_PPPOL2TP socket option
  level. A local, unprivileged user could use this flaw to escalate their
  privileges on the system. (CVE-2014-4943, Important)

Red Hat would like to thank Sasha Levin for reporting this issue.

This update also fixes the following bug:

• When a device was registered to a bus, a race condition could occur
  between the device being added to the list of devices of the bus and
  binding the device to a driver. As a result, the device could already be
  bound to a driver which led to a warning and incorrect reference counting,
  and consequently to a kernel panic on device removal. To avoid the race
  condition, this update adds a check to identify an already bound device.
  (BZ#1114409)

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.