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Red Hat: RHSA-2015:1978-01 Moderate: Kernel Bug Fix and Security Update

red hat
Calendar Grey November 3, 2015
Dist Redhat Esm H88
Ubuntu announces Important software upgrade tackling vulnerabilities and improvements. Crucial information for system administrators.
Updated kernel packages that fix two security issues, several bugs, and add one enhancement are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
* A flaw was found in the way the Linux kernel's VFS subsystem handled file system locks. A local, unprivileged user could use this flaw to trigger a deadlock in the kernel, causing a denial of service on the system. (CVE-2014-8559, Moderate)
* A buffer overflow flaw was found in the way the Linux kernel's virtio-net subsystem handled certain fraglists when the GRO (Generic Receive Offload) functionality was enabled in a bridged network configuration. An attacker on the local network could potentially use this flaw to crash the system, or, although unlikely, elevate their privileges on the system. (CVE-2015-5156, Moderate)
The CVE-2015-5156 issue was discovered by Jason Wang of Red Hat.
This update also fixes several bugs and adds one enhancement. Refer to the following Knowledgebase article for further information:
https://access.redhat.com/articles/2039563
All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues and add this enhancement. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat buffer overflow bug fix kernel system update

References

https://access.redhat.com/security/cve/CVE-2014-8559 https://access.redhat.com/security/cve/CVE-2015-5156 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/articles/2039563

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-229.20.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-229.20.1.el7.noarch.rpm kernel-doc-3.10.0-229.20.1.el7.noarch.rpm
x86_64: kernel-3.10.0-229.20.1.el7.x86_64.rpm kernel-debug-3.10.0-229.20.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-229.20.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-229.20.1.el7.x86_64.rpm kernel-devel-3.10.0-229.20.1.el7.x86_64.rpm kernel-headers-3.10.0-229.20.1.el7.x86_64.rpm kernel-tools-3.10.0-229.20.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-229.20.1.el7.x86_64.rpm perf-3.10.0-229.20.1.el7.x86_64.rpm perf-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: kernel-debug-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-229.20.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-229.20.1.el7.x86_64.rpm perf-debuginfo-3.10.0-229.20.1.el7.x86_64.rpm python-perf-3.10.0-229.20.1.el7.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2015:1978-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1978.html
Issue date: 2015-11-03

Topic

Updated kernel packages that fix two security issues, several bugs, and addone enhancement are now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Moderate securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat buffer overflow bug fix kernel system update

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, s390x, x86_64

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

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

Bugs Fixed

1159313 - CVE-2014-8559 kernel: fs: deadlock due to incorrect usage of rename_lock

1243852 - CVE-2015-5156 kernel: buffer overflow with fraglist larger than MAX_SKB_FRAGS + 2 in virtio-net

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