[USN-2717-1] Linux kernel (Utopic HWE) vulnerability

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==========================================================================
Ubuntu Security Notice USN-2717-1
August 18, 2015

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

Details:

Marcelo Ricardo Leitner discovered a race condition in the Linux kernel's
SCTP address configuration lists when using Address Configuration Change
(ASCONF) options on a socket. An unprivileged local user could exploit this
flaw 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-3.16.0-46-generic 3.16.0-46.62~14.04.1
linux-image-3.16.0-46-generic-lpae 3.16.0-46.62~14.04.1
linux-image-3.16.0-46-lowlatency 3.16.0-46.62~14.04.1
linux-image-3.16.0-46-powerpc-e500mc 3.16.0-46.62~14.04.1
linux-image-3.16.0-46-powerpc-smp 3.16.0-46.62~14.04.1
linux-image-3.16.0-46-powerpc64-emb 3.16.0-46.62~14.04.1
linux-image-3.16.0-46-powerpc64-smp 3.16.0-46.62~14.04.1

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
http://www.ubuntu.com/usn/usn-2717-1
CVE-2015-3212

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-46.62~14.04.1