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Alerts This Week
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Red Hat Enterprise Linux 7.2 RHSA-2018:1216-01 CVE-2017-8824 Important Socket Issue

red hat
Calendar Grey April 24, 2018
Scroller Redhat
Ubuntu issues vital kernel patch addressing security vulnerabilities and bug resolutions in 20.04 LTS. System restart necessary.
An update for kernel is now available for Red Hat Enterprise Linux 7.2 Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended Update Support, and Red Hat Enterprise L...

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):
* kernel: Use-after-free vulnerability in DCCP socket (CVE-2017-8824, Important)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank Mohamed Ghannam for reporting this issue.
Bug Fix(es):
* Previously, the XFS code included a circular dependency between the xfs-log and the xfs-cil workqueues. Consequently, an XFS deadlock occurred in some cases. This update adds a new workqueue dedicated to the log covering background task to avoid the deadlock. (BZ#1543303)
* The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1553181)

Topics%20covered

Topics Covered

security advisory kernel update Red Hat Enterprise Linux important security fix use-after-free issue DCCP socket xfs deadlock

References

https://access.redhat.com/security/cve/CVE-2017-8824 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.2):
Source: kernel-3.10.0-327.66.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-327.66.1.el7.noarch.rpm kernel-doc-3.10.0-327.66.1.el7.noarch.rpm
x86_64: kernel-3.10.0-327.66.1.el7.x86_64.rpm kernel-debug-3.10.0-327.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.66.1.el7.x86_64.rpm kernel-devel-3.10.0-327.66.1.el7.x86_64.rpm kernel-headers-3.10.0-327.66.1.el7.x86_64.rpm kernel-tools-3.10.0-327.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.66.1.el7.x86_64.rpm perf-3.10.0-327.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm python-perf-3.10.0-327.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.2):
Source: kernel-3.10.0-327.66.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-327.66.1.el7.noarch.rpm kernel-doc-3.10.0-327.66.1.el7.noarch.rpm
ppc64le: kernel-3.10.0-327.66.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-327.66.1.el7.ppc64le.rpm kernel-debug-3.10.0-327.66.1.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:1216-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:1216
Issue date: 2018-04-24

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.2Advanced Update Support, Red Hat Enterprise Linux 7.2 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.2 Update Services for SAPSolutions.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 Red Hat Enterprise Linux important security fix use-after-free issue DCCP socket xfs deadlock

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.2) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.2) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.2) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.2) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.2) - noarch, x86_64

Bugs Fixed

1519591 - CVE-2017-8824 kernel: Use-after-free vulnerability in DCCP socket

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