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====================================================================                   Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
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
CVE Names:         CVE-2017-8824 
====================================================================
1. Summary:

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 Linux 7.2 Update Services for SAP
Solutions.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. 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

3. Description:

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)

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. 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
kernel-debug-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-devel-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-headers-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-tools-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-327.66.1.el7.ppc64le.rpm
perf-3.10.0-327.66.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
python-perf-3.10.0-327.66.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.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 TUS (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 Optional AUS (v. 7.2):

x86_64:
kernel-debug-debuginfo-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-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.66.1.el7.x86_64.rpm
perf-debuginfo-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 Optional E4S (v. 7.2):

ppc64le:
kernel-debug-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-327.66.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-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-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.66.1.el7.x86_64.rpm
perf-debuginfo-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 Optional TUS (v. 7.2):

x86_64:
kernel-debug-debuginfo-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-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

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

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2018 Red Hat, Inc.
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RedHat: RHSA-2018-1216:01 Important: kernel security and bug fix update

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...

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)

Summary

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.

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 kernel-debug-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.66.1.el7.ppc64le.rpm kernel-devel-3.10.0-327.66.1.el7.ppc64le.rpm kernel-headers-3.10.0-327.66.1.el7.ppc64le.rpm kernel-tools-3.10.0-327.66.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-327.66.1.el7.ppc64le.rpm perf-3.10.0-327.66.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm python-perf-3.10.0-327.66.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.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 TUS (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 Optional AUS (v. 7.2):
x86_64: kernel-debug-debuginfo-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-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.66.1.el7.x86_64.rpm perf-debuginfo-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 Optional E4S (v. 7.2):
ppc64le: kernel-debug-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-327.66.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-327.66.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-327.66.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-327.66.1.el7.ppc64le.rpm
x86_64: kernel-debug-debuginfo-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-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.66.1.el7.x86_64.rpm perf-debuginfo-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 Optional TUS (v. 7.2):
x86_64: kernel-debug-debuginfo-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-tools-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.66.1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/

Severity

Advisory ID: RHSA-2018:1216-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2018:1216

Issued Date: : 2018-04-24

CVE Names: CVE-2017-8824

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.