Linus Henze’s Fugu15 jailbreak for arm64e devices running iOS & iPadOS 15.0-15.4.1 was first announced and demonstrated last October, but it was primarily intended for developers since there wasn’t any tweak injection to make it user friendly.
But iOS developer @evelyneee seems to have a solution in the form of a working tweak injection method they call ElleKit, which appears to be a fully open source and Swift-based tweak injection method comparable to Substitute and libhooker.
In a Tweet shared Sunday, @evelyneee said that the tweak injection works well on Linus Henze’s jailbreak platform, which alluded to Fugu15 and may also apply to the recently-released ra1ncloud Fugu15-based jailbreak, that offers a more user-friendly interface.
In some follow-up questions about the Tweet, @evelyneee said that while jailbreak tweaks and repositories would need to be updated for the rootless dynamic, ElleKit is already mostly working. This appears to suggest that ElleKit could be deployed as a tweak injection method on Fugu15, and possibly even ra1ncloud if necessary.
ElleKit isn’t yet supported system wide and doesn’t yet support hooking C functions, but these are small kinks that may eventually be worked out as the project progresses.
One major caveat worth mentioning, is that a Wi-Fi related issue known to cause panics on certain version(s) of iOS or iPadOS 15 when jailbroken with Fugu15, namely version 15.3.1, still remains.
Regardless of the aforementioned caveat, the working tweak injection method is a serious step in the right direction as people who’ve been sitting on the lowest possible firmware continue to wait for a public jailbreak solution.
Fugu15 and the ra1ncloud Fugu15-based jailbreak, both support iOS & iPadOS 15.0-15.4.1 devices, which means the iPhone XS and newer.
While the developer-centric XinaA15 jailbreak also works on the iPhone XS and newer, it only supports iOS & iPadOS 15.0-15.1.1 by comparison. Those using an iPhone X or older on any version of iOS or iPadOS 15 can use the checkm8 bootrom exploit-based palera1n jailbreak tool instead.
Are you excited about the implications of a working tweak injection method for the Fugu15 jailbreak and possibly other jailbreaks that are based on it? Be sure to let us know in the comments section down below.