7.2 - USN-2870-1

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

- Ubuntu 14.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description: - linux: Linux kernel

Details:

Yevgeny Pats discovered that the session keyring implementation in the Linux kernel did not properly reference count when joining an existing session keyring. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges.

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-76-generic 3.13.0-76.120
linux-image-3.13.0-76-generic-lpae 3.13.0-76.120
linux-image-3.13.0-76-lowlatency 3.13.0-76.120
linux-image-3.13.0-76-powerpc-e500 3.13.0-76.120
linux-image-3.13.0-76-powerpc-e500mc 3.13.0-76.120
linux-image-3.13.0-76-powerpc-smp 3.13.0-76.120
linux-image-3.13.0-76-powerpc64-emb 3.13.0-76.120
linux-image-3.13.0-76-powerpc64-smp 3.13.0-76.120

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-2870-1
CVE-2016-0728

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-76.120