The kernel was patched in the iOS 9 beta, but it can still be accessed using the iOS 8.4.1, which means that Pangu could still release the iOS 8.4.1 jailbreak anytime it wants to.
It is the intention of Pangu to withhold the release of the Apple iOS 8.4.1 Jailbreak because the American tech giant would surely patch it in time for its release of the Apple iOS 9.
It has been previously rumored that Apple iOS 9 would be released on September 9, but it did not happen, leaving the launching possibility in October. It is possible that Apple has intentionally delayed the release of the iOS 9 to make it compete directly to the upcoming Android 6.0 Marshmallow to be released by Google either in October or November.
While jailbreaking an iPhone of other iOS devices allows users to gain root access to the iOS file system, Apple does not officially endorse it, as it considers jailbreaking a threat to the security of the iOS.
Many iOS users want to gain full control of their iPhones and iPads and be able to download apps, themes, extensions and other software that are not normally available for iOS devices that are not jailbroken.