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Alerts This Week
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Red Hat 7.1: RHSA-2017:0004-01 Important: Networking Flaw Fix

red hat
Calendar Grey January 3, 2017
Scroller Redhat
Crucial kernel upgrade for CentOS tackles severe connectivity problem and incorporates vital patches for enhanced performance.
An update for kernel is now available for Red Hat Enterprise Linux 7.1 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

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):
* A flaw was found in the way the Linux kernel's networking subsystem handled offloaded packets with multiple layers of encapsulation in the GRO (Generic Receive Offload) code path. A remote attacker could use this flaw to trigger unbounded recursion in the kernel that could lead to stack corruption, resulting in a system crash. (CVE-2016-8666, Important)
Bug Fix(es):
* When a virtual machine (VM) with PCI-Passthrough interfaces was recreated, the operating system rebooted. This update fixes the race condition between the eventfd daemon and the virqfd daemon. As a result, the operating system no longer reboots in the described situation. (BZ#1391609)

Topics%20covered

Topics Covered

security advisory kernel update bug fix Red Hat Enterprise Linux important remote attacker networking flaw

References

https://access.redhat.com/security/cve/CVE-2016-8666 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1):
Source: kernel-3.10.0-229.46.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-229.46.1.el7.noarch.rpm kernel-doc-3.10.0-229.46.1.el7.noarch.rpm
x86_64: kernel-3.10.0-229.46.1.el7.x86_64.rpm kernel-debug-3.10.0-229.46.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-229.46.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7.x86_64.rpm kernel-devel-3.10.0-229.46.1.el7.x86_64.rpm kernel-headers-3.10.0-229.46.1.el7.x86_64.rpm kernel-tools-3.10.0-229.46.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-229.46.1.el7.x86_64.rpm perf-3.10.0-229.46.1.el7.x86_64.rpm perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1):
x86_64: kernel-debug-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-229.46.1.el7.x86_64.rpm perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0004-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0004.html
Issue date: 2017-01-03

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.1Extended 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 Red Hat Enterprise Linux important remote attacker networking flaw

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.1) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1384991 - CVE-2016-8666 kernel: Remotely triggerable recursion in GRE code leading to kernel crash

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