Ubuntu systems already have LTS enablement stacks that provide newer kernel and X support for existing Ubuntu LTS releases. As we all know, BackBox core system is built on Ubuntu system and therefore the same principle can be applied.
For those who are impatient and want to upgrade the kernel stack with their current BackBox 4.x to the latest available, you can follow the instructions below:
$ sudo apt-get install --install-recommends linux-generic-lts-xenial xserver-xorg-core-lts-xenial xserver-xorg-lts-xenial xserver-xorg-video-all-lts-xenial xserver-xorg-input-all-lts-xenial libwayland-egl1-mesa-lts-xenial
And we are all good just like that!
The full description for Ubuntu systems can be found at https://wiki.ubuntu.com/Kernel/LTSEnablementStack (Ubuntu 14.04 LTS – Trusty Tahr)
If any issues occur, feel free to get in touch with BackBox Community where you will have support.