CVE-2021-30686

Name of the Vulnerable Software and Affected Versions macOS versions prior to 11.4 tvOS versions prior to 14.6 iOS versions prior to 14.6 iPadOS versions prior to 14.6 watchOS versions prior to 7.5

Description The issue is related to an out-of-bounds read that was addressed with improved bounds checking. Processing a maliciously crafted audio file may disclose restricted memory. This is due to a buffer overflow vulnerability in the USACBitstreamReader function of the operating systems, which can allow an attacker to reveal protected information.

Recommendations For macOS versions prior to 11.4, update to macOS Big Sur 11.4 or later. For tvOS versions prior to 14.6, update to tvOS 14.6 or later. For iOS versions prior to 14.6, update to iOS 14.6 or later. For iPadOS versions prior to 14.6, update to iPadOS 14.6 or later. For watchOS versions prior to 7.5, update to watchOS 7.5 or later. As a temporary workaround, consider avoiding the use of maliciously crafted audio files until the issue is resolved.