https://sn.1w6.org/file/bob-20160513T130112-h9g4v7b.html
The recent backdoor found in Allwinner kernels doesn't apply to Cubieboard/Cubietruck images of #Freedombone, since the debian kernel is based upon mainline. The kernel which Allwinner ships is their own special branch. It just goes to show - stick to known distros and don't use the specially tweaked OS which ships by default on the hardware.