On September 27th, an independent iOS security researcher using the Twitter handle axi0mX reported on checkm8. Described as “permanent unpatchable bootrom exploit” for any iOS device with an A5 chip (iPhone 4s/iPad 2) up to an A11 chip (iPhone X), this vulnerability could have serious security implications for anyone using devices with these chips. This exploit also opens the door for iOS users to jailbreak their own devices, without the fear of being “patched” by a subsequent iOS update. However, the only way to take advantage of this exploit is via USB, so the attacker must have physical possession of the device in order to cause harm.
https://www.lookout.com/threat-intellig ... le/checkm8