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Red Hat Enterprise Linux 6.7 RHSA-2018:0496-01 Important Kernel Update

red hat
Calendar Grey March 13, 2018
Scroller Redhat
An important kernel security patch for CentOS, aimed at essential bug rectifications and enhancements to the kernel system.
An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support

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

Users of kernel are advised to upgrade to these updated packages, which fix these bugs. The system must be rebooted for this update to take effect.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* hw: cpu: speculative execution branch target injection (s390-only) (CVE-2017-5715, Important)
* hw: cpu: speculative execution bounds-check bypass (s390 and powerpc) (CVE-2017-5753, Important)
* hw: cpu: speculative execution permission faults handling (powerpc-only) (CVE-2017-5754)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Bug Fix(es):
* If an NFSv3 client mounted a subdirectory of an exported file system, a directory entry to the mount hosting the export was incorrectly held even after clearing the cache. Consequently, attempts to unmount the subdirectory with the umount command failed with the EBUSY error. With this update, the underlying source code has been fixed, and the unmount operation now succeeds as expected in the described situation. (BZ#1538587)
* The Return Trampoline (Retpoline) mechanism mitigates the branch target injection, also known as the Spectre variant 2 vulnerability. With this update, Retpoline has been implemented into the Red Hat Enterprise Linux kernel. (BZ#1543023)

Topics%20covered

Topics Covered

security advisory kernel update bug fix security fix important red hat enterprise linux kernel

References

https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):
Source: kernel-2.6.32-573.53.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-573.53.1.el6.noarch.rpm kernel-doc-2.6.32-573.53.1.el6.noarch.rpm kernel-firmware-2.6.32-573.53.1.el6.noarch.rpm
x86_64: kernel-2.6.32-573.53.1.el6.x86_64.rpm kernel-debug-2.6.32-573.53.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.53.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.53.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.53.1.el6.i686.rpm kernel-debug-devel-2.6.32-573.53.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.53.1.el6.i686.rpm kernel-debuginfo-2.6.32-573.53.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.53.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.53.1.el6.x86_64.rpm kernel-devel-2.6.32-573.53.1.el6.x86_64.rpm kernel-headers-2.6.32-573.53.1.el6.x86_64.rpm perf-2.6.32-573.53.1.el6.x86_64.rpm perf-debuginfo-2.6.32-573.53.1.el6.i686.rpm perf-debuginfo-2.6.32-573.53.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.53.1.el6.i686.rpm python-perf-debuginfo-2.6.32-573.53.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):
x86_64: kernel-debug-debuginfo-2.6.32-573.53.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.53.1.el6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:0496-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0496
Issue date: 2018-03-13

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.7Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory kernel update bug fix security fix important red hat enterprise linux kernel

Relevant Releases Architectures

Red Hat Enterprise Linux HPC Node EUS (v. 6.7) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64

Bugs Fixed

1519778 - CVE-2017-5753 hw: cpu: speculative execution bounds-check bypass

1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection

1519781 - CVE-2017-5754 hw: cpu: speculative execution permission faults handling

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