Issued:
2012-09-19
Updated:
2012-09-19

RHSA-2012:1282 - Moderate: kernel-rt security, bug fix, and enhancement update

Synopsis

Moderate: kernel-rt security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

Updated kernel-rt packages that fix one security issue, several bugs, and add enhancements are now available for Red Hat Enterprise MRG 2.2.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Description

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

This update fixes the following security issue:

  • It was found that a deadlock could occur in the Out of Memory (OOM) killer. A process could trigger this deadlock by consuming a large amount of memory, and then causing request_module() to be called. A local, unprivileged user could use this flaw to cause a denial of service (excessive memory consumption). (CVE-2012-4398, Moderate)

Red Hat would like to thank Tetsuo Handa for reporting this issue.

The kernel-rt packages have been upgraded to upstream version 3.2, which provides a number of bug fixes and enhancements over the previous version. (BZ#798421)

This update also fixes various bugs and adds enhancements. 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 kernel-rt packages, which correct this issue, fix these bugs, and add these enhancements. The system must be rebooted for this update to take effect.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system.

Affected Products

ProductVersionArch
MRG Realtime2x86_64

Updated Packages

  • kernel-rt-trace-3.2.23-rt37.56.el6rt.x86_64.rpm
  • rt-firmware-1.0-3.el6_3.src.rpm
  • kernel-rt-debug-devel-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-vanilla-devel-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-vanilla-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-debug-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm
  • mrg-rt-release-3.2.23-rt37.56.el6rt.noarch.rpm
  • kernel-rt-trace-devel-3.2.23-rt37.56.el6rt.x86_64.rpm
  • rt-firmware-1.0-3.el6_3.noarch.rpm
  • kernel-rt-vanilla-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-debug-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-debuginfo-common-x86_64-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-doc-3.2.23-rt37.56.el6rt.noarch.rpm
  • kernel-rt-3.2.23-rt37.56.el6rt.src.rpm
  • kernel-rt-firmware-3.2.23-rt37.56.el6rt.noarch.rpm
  • kernel-rt-trace-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm
  • kernel-rt-devel-3.2.23-rt37.56.el6rt.x86_64.rpm

Fixes

CVEs

References

Additional information