kernel, perf, python security update

CentOS Errata and Security Advisory CESA-2014:0924

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

• It was found that the Linux kernel’s ptrace subsystem allowed a traced
  process’ instruction pointer to be set to a non-canonical memory address
  without forcing the non-sysret code path when returning to user space.
  A local, unprivileged user could use this flaw to crash the system or,
  potentially, escalate their privileges on the system. (CVE-2014-4699,
  Important)

Note: The CVE-2014-4699 issue only affected systems using an Intel CPU.

• 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 Andy Lutomirski for reporting CVE-2014-4699,
and Sasha Levin for reporting CVE-2014-4943.

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.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2014-July/082606.html

Affected packages:
kernel
kernel-abi-whitelists
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-2014:0924