A working exploit for the checkm8 BootROM vulnerability is now available and security experts fear that threat actors could use is in attacks in the wild. In September, the security expert Axi0mX released a new jailbreak, dubbed Checkm8, that works on all iOS devices running on A5 to A11 chipsets. The jailbreak works with all Apple products released between 2011 and 2017, including iPhone models from 4S to 8 and X. The only way to mitigate protect the devices from the exploit is by upgrading devices to an iPhone XR or more recent.”]
Source: https://securityaffairs.co/wordpress/93923/hacking/checkra1n-iphone-jailbreak.html