[USN-3036-1] Linux kernel (Utopic HWE) vulnerability

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-3036-1
July 14, 2016

linux-lts-utopic vulnerability
==========================================================================

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

- Ubuntu 14.04 LTS

Summary:

The system could be made to crash under certain conditions.

Software Description:
- linux-lts-utopic: Linux hardware enablement kernel from Utopic for Trusty

Details:

Jan Stancek discovered that the Linux kernel's memory manager did not
properly handle moving pages mapped by the asynchronous I/O (AIO) ring
buffer to the other nodes. A local attacker could use this to cause a
denial of service (system crash).

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-77-generic   3.16.0-77.99~14.04.1
  linux-image-3.16.0-77-generic-lpae  3.16.0-77.99~14.04.1
  linux-image-3.16.0-77-lowlatency  3.16.0-77.99~14.04.1
  linux-image-3.16.0-77-powerpc-e500mc  3.16.0-77.99~14.04.1
  linux-image-3.16.0-77-powerpc-smp  3.16.0-77.99~14.04.1
  linux-image-3.16.0-77-powerpc64-emb  3.16.0-77.99~14.04.1
  linux-image-3.16.0-77-powerpc64-smp  3.16.0-77.99~14.04.1

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-3036-1
  CVE-2016-3070

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-77.99~14.04.1

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