Apple has released iOS 13.5.1 today, which the company says “provides important security updates and is recommended for all users”, albeit without much detail in the change log. But as noted by Twitter account Apple Software Updates, the update is intended to correct the core quality used by the latest Unc0ver jailbreak.
Apple’s support page shows things more clearly – the update was designed to prevent an application from “running any code with core privileges.” In other words, iOS 1
Unc0ver jailbreak was particularly noteworthy in the iOS jailbreaking community as it was available on the then iOS 13.5, allowing users of the latest Apple devices to install new software features outside of Apple’s gated App Store.
While it’s really fun for iPhone enthusiasts to be able to have more customization options for their devices, jailbreaks like this can also represent major security holes in Apple’s software (something the company relies heavily on as an advantage with iOS), so it’s Not exactly a surprise to see that Apple has moved so quickly to correct the vulnerability.