A new release of the Ubuntu Cloud Images for stable Ubuntu release 14.04 LTS (Trusty Tahr) is available at [1]. These new images superseded the existing images [2]. Images are available for download or immediate use on EC2 via publish AMI ids. Users who wish to update their existing installations can do so with:
   'sudo apt-get update && sudo apt-get dist-upgrade && sudo reboot'.

The Linux kernel was updated from 3.13.0-46.76 [3] to 3.13.0-46.77 [4]

The following packages have been updated. Please see the full changelogs
for a complete listing of changes:
 * linux: 3.13.0-46.76 => 3.13.0-46.77 


The following is a complete changelog for this image.
new: {}
removed: {}
changed: ['linux-headers-3.13.0-46', 'linux-headers-3.13.0-46-generic', 'linux-image-3.13.0-46-generic']
==== linux: 3.13.0-46.76 => 3.13.0-46.77 ====
====     linux-headers-3.13.0-46-generic linux-headers-3.13.0-46 linux-image-3.13.0-46-generic
  [ Seth Forshee ]
  * Revert "ipv6: fix swapped ipv4/ipv6 mtu_reduced callbacks"
    - LP: #1404558
  * Release Tracking Bug
    - LP: #1427292

--
[1] http://cloud-images.ubuntu.com/releases/trusty/release-20150305/
[2] http://cloud-images.ubuntu.com/releases/trusty/release-20150227.2/
[3] http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_3.13.0-46.76/changelog
[4] http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_3.13.0-46.77/changelog