Comment by seba_dos1

That's right, but... who exposes ESP32's HCI to external world (and not just to another trusted chip) in actual projects? This is the kind of feature you see popping up as a Hackaday article titled "Your ESP32 As A USB Bluetooth Dongle" - you say "neat" and then proceed to forget about it.

If you find a device that does it in the wild, then I guess you now gained a nice jailbreaking vector - that is, if it needed jailbreaking at all. Otherwise, it's nothing.