The mobile tech world, and especially the Apple corner of that world, was flooded by news over the weekend about what could have been Apple’s worst nightmare come to life. Just like what happened on the Switch and the Fusée Gelée exploit, a security researcher discovered a similar vulnerability that lay deep in the most inaccessible part of an iPhone’s hardware. On paper, this exploit dubbed “checkm8” could offer a permanent way to jailbreak iPhones older than the iPhone Xs. In practice, regular users who want nothing to do with the jailbreaking scene have nothing to worry about unless they hand over their iPhones to an unauthorized person.
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https://www.slashgear.com/ios-checkm8-exploit-promises-unpatchable-jailbreaks-with-some-caveats-29593293/