A public early beta preview of the semi-tethered checkra1n iOS jailbreak based on the iOS Checkm8 exploit was released over the weekend. The tool can be used to jailbreak all iOS devices running up to iOS 12.3 between the iPhone 5s and the iPhone X. This beta version currently does not support iPad Air 2, iPad 5th Gen, and iPad Pro 1st Gen. The tool’s development team says it may require more attempts than usual.
Source: https://www.bleepingcomputer.com/news/apple/checkra1n-ios-jailbreak-gets-public-beta-update-with-fixes/