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Red Hat 7 RHSA-2016:2047-01 Important: Kernel Stack Overflow Issue

red hat
Calendar Grey October 10, 2016
Scroller Redhat
Implementing the latest Red Hat kernel security patch mitigates critical risks to enhance your system's stability.
An update for kernel is now available for Red Hat Enterprise Linux 7

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):
* Linux kernel built with the 802.1Q/802.1ad VLAN(CONFIG_VLAN_8021Q) OR Virtual eXtensible Local Area Network(CONFIG_VXLAN) with Transparent Ethernet Bridging(TEB) GRO support, is vulnerable to a stack overflow issue. It could occur while receiving large packets via GRO path as an unlimited recursion could unfold in both VLAN and TEB modules leading to a stack corruption in the kernel. (CVE-2016-7039, Important)

Topics%20covered

Topics Covered

security advisory security issue red hat important kernel stack overflow crash issue

References

https://access.redhat.com/security/cve/CVE-2016-7039 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-327.36.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-327.36.2.el7.noarch.rpm kernel-doc-3.10.0-327.36.2.el7.noarch.rpm
x86_64: kernel-3.10.0-327.36.2.el7.x86_64.rpm kernel-debug-3.10.0-327.36.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.36.2.el7.x86_64.rpm kernel-devel-3.10.0-327.36.2.el7.x86_64.rpm kernel-headers-3.10.0-327.36.2.el7.x86_64.rpm kernel-tools-3.10.0-327.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.36.2.el7.x86_64.rpm perf-3.10.0-327.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm python-perf-3.10.0-327.36.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: kernel-debug-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.36.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.36.2.el7.x86_64.rpm perf-debuginfo-3.10.0-327.36.2.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2047-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2047.html
Issue date: 2016-10-10

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.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 security issue red hat important kernel stack overflow crash issue

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1375944 - CVE-2016-7039 kernel: remotely triggerable unbounded recursion in the vlan gro code leading to a kernel crash

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