Apple has released security updates to address a zero-day vulnerability that had been exploited in the wild, impacting iPhones, iPads, and Macs. The vulnerability, tracked as CVE-2021-30807, is a memory corruption issue in the IOMobileFramebuffer kernel extension reported by an anonymous researcher. The bug allowed applications to execute arbitrary code with kernel privileges. Apple fixed it by improving memory handling in iOS 14.7.1, iPadOS 14.7.1, and macOS Big Sur 11.5.1. The list of impacted devices includes Macs, iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation). “Apple is aware of a report that this issue may have been actively exploited,” the company said in security advisories. While Apple did disclose that at least one report mentioned CVE-2021-30807 active exploitation in the wild, the company did not release any additional information regarding these attacks. Withholding this info is likely a measure designed to allow the security updates released today to reach as many iPhones, iPads, and Macs as possible before other threat actors pick up on the details and start actively abusing the now-patched zero-day.
All Apple users are highly recommended to apply this update as soon as possible. To apply this new patch on Apple devices, a link is attached from Apple that contains instructions on how to apply these updates.