So there’s a fresh Linux kernel vulnerability doing the rounds this week — dubbed CopyFail — and if you’re running any Linux-based systems at home or at work, it’s worth taking a few minutes to understand what’s actually going on before you either panic-patch everything or, worse, shrug and do nothing.

I’ve been following the discussion online and it’s been… instructive, in the way that watching people argue about fire safety while standing in a building that may or may not be on fire tends to be.