Sony have tweeted that they have now fixed the glitch that allegedly bricked consoles. They also say that it wasn’t bricking them, instead it was getting them stuck in an infinite crash loop.
We've since fixed the issue, and it wasn't bricking consoles, just sending them into a crash loop that can be quickly fixed in under 5 minutes. Delete the message on the PS mobile app, go into Safe Mode, use Option 5, console back to normal. ^DB
— Ask PlayStation UK (@AskPS_UK) October 15, 2018
I didn’t notice any hotfixes for my PlayStation downloading last night so maybe they’ve done something behind the scenes.