At the end of May 2020, we talked about the release of the new Unc0ver jailbreak version (5.0.0). It is noteworthy that this tool worked for almost any iPhone, even with the latest iOS 13.5 on board, and the last time a similar tool was released in 2014.
The authors of Unc0ver explained that it uses a zero kernel vulnerability in the iOS kernel, which Apple experts do not yet know about. It was reported that the vulnerability was discovered by one of the team members, who is known under the pseudonym Pwn20wnd.
On Monday, Apple introduced iOS 13.5.1 for the iPhone, iPad and iPod touch, and the latest version of the Unc0ver jailbreak no longer works with this version of iOS.
Notes on this release is listed only one security update and fix for the vulnerability CVE-2020-9859, which the jailbreak exploited (the application could gain kernel privileges and execute arbitrary code).
Thus, everyone who used Unc0ver 5.0.0, in combination with iOS 13.5, is not recommended to update, as the new OS version will “break” the jailbreak and will not allow it to be performed again.