=========================================================================Ubuntu Security Notice USN-2620-1
May 23, 2015

linux 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: Linux kernel

Details:

A flaw was discovered in the Linux kernel's IPv4 networking when using TCP
fast open to initiate a connection. 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-3.13.0-53-generic   3.13.0-53.89
  linux-image-3.13.0-53-generic-lpae  3.13.0-53.89
  linux-image-3.13.0-53-lowlatency  3.13.0-53.89
  linux-image-3.13.0-53-powerpc-e500  3.13.0-53.89
  linux-image-3.13.0-53-powerpc-e500mc  3.13.0-53.89
  linux-image-3.13.0-53-powerpc-smp  3.13.0-53.89
  linux-image-3.13.0-53-powerpc64-emb  3.13.0-53.89
  linux-image-3.13.0-53-powerpc64-smp  3.13.0-53.89

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

References:
  https://ubuntu.com/security/notices/USN-2620-1
  CVE-2015-3332

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.13.0-53.89