Issued:
2016-04-12
Updated:
2016-04-12

RHSA-2016:0617 - Moderate: kernel security and bug fix update

Synopsis

Moderate: kernel security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.6 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

  • It was found that the fix for CVE-2015-1805 incorrectly kept buffer offset and buffer length in sync on a failed atomic read, potentially resulting in a pipe buffer state corruption. A local, unprivileged user could use this flaw to crash the system or leak kernel memory to user space. (CVE-2016-0774, Moderate)

The security impact of this issue was discovered by Red Hat.

Bug Fix(es):

  • Due to prematurely decremented calc_load_task, the calculated load average was off by up to the number of CPUs in the machine. As a consequence, job scheduling worked improperly causing a drop in the system performance. This update keeps the delta of the CPU going into NO_HZ idle separately, and folds the pending idle delta into the global active count while correctly aging the averages for the idle-duration when leaving NO_HZ mode. Now, job scheduling works correctly, ensuring balanced CPU load. (BZ#1308968)

  • Previously, the Stream Control Transmission Protocol (SCTP) retransmission path selection was not fully RFC compliant when Partial Failover had been enabled. The provided patch provides SCTP path selection updates, thus fixing this bug. (BZ#1306565)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.6i386
Red Hat Enterprise Linux for Power, big endian - Extended Update Support6.6ppc64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support6.6s390x
Red Hat Enterprise Linux Server - TUS6.6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.6i386
Red Hat Enterprise Linux Server - AUS6.6x86_64
Red Hat Enterprise Linux EUS Compute Node6.6x86_64

Updated Packages

  • perf-2.6.32-504.46.1.el6.x86_64.rpm
  • python-perf-2.6.32-504.46.1.el6.i686.rpm
  • kernel-headers-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debuginfo-common-ppc64-2.6.32-504.46.1.el6.ppc64.rpm
  • python-perf-debuginfo-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-2.6.32-504.46.1.el6.src.rpm
  • kernel-firmware-2.6.32-504.46.1.el6.noarch.rpm
  • kernel-kdump-debuginfo-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-headers-2.6.32-504.46.1.el6.x86_64.rpm
  • kernel-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debug-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debuginfo-2.6.32-504.46.1.el6.s390x.rpm
  • python-perf-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-headers-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debug-2.6.32-504.46.1.el6.x86_64.rpm
  • kernel-debuginfo-common-x86_64-2.6.32-504.46.1.el6.x86_64.rpm
  • perf-debuginfo-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debuginfo-2.6.32-504.46.1.el6.i686.rpm
  • kernel-2.6.32-504.46.1.el6.x86_64.rpm
  • perf-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debuginfo-2.6.32-504.46.1.el6.x86_64.rpm
  • perf-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-headers-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-debug-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-devel-2.6.32-504.46.1.el6.s390x.rpm
  • perf-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-debug-debuginfo-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debug-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debug-devel-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-debug-devel-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debug-devel-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debug-devel-2.6.32-504.46.1.el6.x86_64.rpm
  • perf-debuginfo-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-abi-whitelists-2.6.32-504.46.1.el6.noarch.rpm
  • kernel-bootwrapper-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-devel-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debug-debuginfo-2.6.32-504.46.1.el6.ppc64.rpm
  • python-perf-debuginfo-2.6.32-504.46.1.el6.x86_64.rpm
  • kernel-devel-2.6.32-504.46.1.el6.i686.rpm
  • python-perf-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debuginfo-2.6.32-504.46.1.el6.ppc64.rpm
  • kernel-debuginfo-common-s390x-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-debug-debuginfo-2.6.32-504.46.1.el6.x86_64.rpm
  • perf-debuginfo-2.6.32-504.46.1.el6.x86_64.rpm
  • kernel-kdump-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-doc-2.6.32-504.46.1.el6.noarch.rpm
  • perf-debuginfo-2.6.32-504.46.1.el6.i686.rpm
  • python-perf-debuginfo-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-debuginfo-common-i686-2.6.32-504.46.1.el6.i686.rpm
  • kernel-debug-debuginfo-2.6.32-504.46.1.el6.s390x.rpm
  • kernel-kdump-devel-2.6.32-504.46.1.el6.s390x.rpm
  • python-perf-debuginfo-2.6.32-504.46.1.el6.i686.rpm
  • python-perf-2.6.32-504.46.1.el6.x86_64.rpm
  • kernel-devel-2.6.32-504.46.1.el6.x86_64.rpm

Fixes

CVEs

References

Additional information