CVE-2021-30996: 
macOS vulnerability analysis and mitigation

A race condition vulnerability (CVE-2021-30996) was discovered in Apple's IOMobileFrameBuffer component that affects iOS, iPadOS, and macOS systems. The vulnerability was fixed in macOS Monterey 12.1, iOS 15.2, and iPadOS 15.2, released on December 13, 2021. The affected systems include iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, iPod touch (7th generation), and macOS Monterey devices (Apple Support, Apple Support).

The vulnerability is a race condition in the IOMobileFrameBuffer component that was addressed with improved state handling. The issue has been assigned a CVSS v3.1 base score of 7.0 (HIGH) with the vector string CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local access is required but no privileges are needed. The vulnerability was discovered by security researcher Saar Amar (@AmarSaar) (NVD).

If exploited, this vulnerability could allow a malicious application to execute arbitrary code with kernel privileges, potentially giving an attacker complete control over the affected device (Apple Support, Hacker News).

Apple has addressed this vulnerability by implementing improved state handling in the affected component. Users are advised to update to macOS Monterey 12.1, iOS 15.2, or iPadOS 15.2 or later versions to protect against this vulnerability. No alternative workarounds were provided (Apple Support, Apple Support).