Cracking Linux with the backspace key?

Anybody who has been paying attention to the net over the last week or so will certainly have noticed an abundance of articles with titles like “How to hack any Linux machine just using backspace“. All this press does indeed highlight an important vulnerability, but it may not be the one that they think they are talking about. The source of these reports is a mildly hype-ridden disclosure of a vulnerability in the GRUB2 bootloader by Hector Marco and Ismael Ripoll.