Chinese security experts Min Zheng and Sialong Bai posted on Twitter evidence of a POP attack on iPhone Xs and Xs Max running iOS 12.1.2. Zheng previously showed an exploit for iPhone 6s.
Finally! (Mach) Port-oriented Programming (a.k.a POP) Attack Proof 3: Get task_for_pid_0 root on iOS 12.1.2 (iPhone XS Max with A12 core), by @ bxl1989 and @SparkZheng. PAC bypassed now! pic.twitter.com/gL3LZMnqUj/p
– Xiaolong Bai (@ bxl1989) January 15, 2019
This proves that the A12 Bionic processor has a vulnerability that could allow jailbreaking. It remains only to wait until the appropriate utility is released. [iPhoneHacks]