IOS 13.5.1 was recently released, which fixed an unpatched kernel exploit. The previous version can no longer be installed.
Previously it was noted that jailbreak on any current iPhone model is now possible for users, however, it seems to contradict now with the previous report as the things are changed now.
Apple stopped giving iOS and iPadOS 13.5 a digital signature on Tuesday. It is now no longer possible to install these operating system versions on iPhones and iPads. This is unusual in that Apple typically waits several weeks for this signature process to finish after a newer version of iOS is available – but this time is different.
Fast end of signing
Because Apple had leveraged the jailbreak unc0ver 5 with the iOS 13.5.1 released at the beginning of June. The latter had exploited a zero-day kernel exploit with which the previous version iOS 13.5 had been delivered. The company responded accordingly and quickly with an update. The end of iOS 13.5 signing now ensures that users can no longer easily downgrade – unless they have secured the so-called SHSH blobs.
All current iPhones affected
unc0ver 5 was able to crack all current iPhones – including the 2019 and 2020 models, i.e. iPhone 11, 11 Pro, 11 Pro Max, and SE 2020. The iPad went up to the iPad Pro 2020. The jailbreak takes place via an app that uses side-loading gets onto the device. When signing ends, Apple usually tries to persuade users to always be on the latest version of iOS—also for security reasons. The fact that the company is now interrupting the jailbreak cycle at an early stage is only logical—as disturbing as it is for those interested in jailbreaking.
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