(RHSA-2010:0053) Important: kernel security and bug fix update

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

This update fixes the following security issues:

• a flaw was found in the IPv6 Extension Header (EH) handling
  implementation in the Linux kernel. The skb->dst data structure was not
  properly validated in the ipv6_hop_jumbo() function. This could possibly
  lead to a remote denial of service. (CVE-2007-4567, Important)

• a flaw was found in each of the following Intel PRO/1000 Linux
  drivers in the Linux kernel: e1000 and e1000e. A remote attacker using
  packets larger than the MTU could bypass the existing fragment check,
  resulting in partial, invalid frames being passed to the network stack.
  These flaws could also possibly be used to trigger a remote denial of
  service. (CVE-2009-4536, CVE-2009-4538, Important)

• a flaw was found in the Realtek r8169 Ethernet driver in the Linux
  kernel. Receiving overly-long frames with a certain revision of the network
  cards supported by this driver could possibly result in a remote denial of
  service. (CVE-2009-4537, Important)

This update also fixes the following bugs:

• on certain hardware, the igb driver was unable to detect link statuses
  correctly for Serializer-Deserializer (SERDES) interface Ethernet ports.
  This may have caused problems for network interface bonding, such as
  failover not occurring. (BZ#548023)

• in certain situations, kdump occasionally dumped a vmcore file with no
  registers on Intel Itanium systems that were under high disk I/O load. In
  these cases, this prevented the kernel stack backtrace in the vmcore from
  being viewed with the crash utility. (BZ#542581)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.