Hello Linux Geeksters. Due to the fact that Canonical has discovered a bunch of kernel exploits on Ubuntu 14.10, they have decided to update the kernel. So, Kernel 3.16.0.31-generic (3.16.0-31.41) have been implemented on Ubuntu 14.10 Utopic Unicorn.
Unfortunately, the ABI has been changed an so, the kernel packages have a new version number, so all the third party kernel modules you might have installed need to be recompiled. Also, the linux-restricted-modules have to be reinstalled, but it is available via the official repositories.
So, to receive the upgrade, do:
$ sudo apt-get update
$ sudo apt-get dist-upgrade
$ sudo apt-get install linux-restricted-modules