kernel, perf, python security update

CentOS Errata and Security Advisory CESA-2012:1426

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

This update fixes the following security issues:

• A use-after-free flaw was found in the Linux kernel’s memory management
  subsystem in the way quota handling for huge pages was performed. A local,
  unprivileged user could use this flaw to cause a denial of service or,
  potentially, escalate their privileges. (CVE-2012-2133, Moderate)

• A use-after-free flaw was found in the madvise() system call
  implementation in the Linux kernel. A local, unprivileged user could use
  this flaw to cause a denial of service or, potentially, escalate their
  privileges. (CVE-2012-3511, Moderate)

• It was found that when running a 32-bit binary that uses a large number
  of shared libraries, one of the libraries would always be loaded at a
  predictable address in memory. An attacker could use this flaw to bypass
  the Address Space Layout Randomization (ASLR) security feature.
  (CVE-2012-1568, Low)

• Buffer overflow flaws were found in the udf_load_logicalvol() function
  in the Universal Disk Format (UDF) file system implementation in the Linux
  kernel. An attacker with physical access to a system could use these flaws
  to cause a denial of service or escalate their privileges. (CVE-2012-3400,
  Low)

Red Hat would like to thank Shachar Raindel for reporting CVE-2012-2133.

This update also fixes several bugs. Documentation for these changes will
be available shortly from the Technical Notes document linked to in the
References section.

Users should upgrade to these updated packages, which contain backported
patches to correct these issues, and fix the bugs noted in the Technical
Notes. The system must be rebooted for this update to take effect.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2012-November/081136.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-2012:1426