In a disclosure to its security updates page on Tuesday, Apple said the update fixed a flaw in WebKit, the browser engine that powers Safari and other apps, which if exploited could allow malicious code to run on the person’s device. The bug is called a zero-day because the vendor is given zero days notice to fix the vulnerability. Apple said security researchers at Google’s Threat Analysis Group, which investigates nation state-backed spyware, hacking and cyberattacks, discovered and reported the WebKit bug.
Apple said in its Tuesday disclosure that it is aware that the vulnerability was exploited “against versions of iOS released before iOS 15.1,” which was released in October 2021. As such, and for those who have not yet updated to iOS 16, Apple also released iOS and iPadOS 15.7.2 to fix the WebKit vulnerability for users running iPhones 6s and later and some iPad models. The bug is tracked as CVE-2022-42856, or WebKit 247562. It’s not clear for what reason Apple withheld details of the bug for two weeks.
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