kernel, perf, python security update

CentOS Errata and Security Advisory CESA-2013:0830

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

This update fixes the following security issue:

• It was found that the Red Hat Enterprise Linux 6.1 kernel update
  (RHSA-2011:0542) introduced an integer conversion issue in the Linux
  kernel’s Performance Events implementation. This led to a user-supplied
  index into the perf_swevent_enabled array not being validated properly,
  resulting in out-of-bounds kernel memory access. A local, unprivileged user
  could use this flaw to escalate their privileges. (CVE-2013-2094,
  Important)

A public exploit that affects Red Hat Enterprise Linux 6 is available.

Refer to Red Hat Knowledge Solution 373743, linked to in the References,
for further information and mitigation instructions for users who are
unable to immediately apply this update.

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

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2013-May/081895.html

Affected packages:
kernel
kernel-debug
kernel-debug-devel
kernel-devel
kernel-doc
kernel-firmware
kernel-headers
perf
python-perf

Upstream details at:
https://access.redhat.com/errata/RHSA-2013:0830