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From: john.johansen@canonical.com
Reply-To: security@ubuntu.com
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <9fd2f317-405d-1782-3a7a-cb1945b703d2@canonical.com>
Subject: [USN-3052-1] Linux kernel vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-3052-1
August 10, 2016

linux vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that the keyring implementation in the Linux kernel did
not ensure a data structure was initialized before referencing it after an
error condition occurred. A local attacker could use this to cause a denial
of service (system crash). (CVE-2016-4470)

Kangjie Lu discovered an information leak in the netlink implementation of
the Linux kernel. A local attacker could use this to obtain sensitive
information from kernel memory. (CVE-2016-5243)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
  linux-image-3.13.0-93-generic   3.13.0-93.140
  linux-image-3.13.0-93-generic-lpae  3.13.0-93.140
  linux-image-3.13.0-93-lowlatency  3.13.0-93.140
  linux-image-3.13.0-93-powerpc-e500  3.13.0-93.140
  linux-image-3.13.0-93-powerpc-e500mc  3.13.0-93.140
  linux-image-3.13.0-93-powerpc-smp  3.13.0-93.140
  linux-image-3.13.0-93-powerpc64-emb  3.13.0-93.140
  linux-image-3.13.0-93-powerpc64-smp  3.13.0-93.140

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
  http://www.ubuntu.com/usn/usn-3052-1
  CVE-2016-4470, CVE-2016-5243

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.13.0-93.140



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