A couple of hours ago, Ian Beer, a well-known security researcher and member of Google’s Project Zero, stated that he has a tfp0 exploit for iOS 11.3.1. Apart from giving us the great news that he has an exploit for a currently signed version of iOS, he also told us that he’ll be releasing it next week!
CoolStar said that he may update Electra to support iOS 11.3.1. However, it must be noted that his updated version of Electra has a considerable chance of only supporting A7-A9 as a KPP bypass may be required to make it work!