About the security content of macOS Big Sur 11.5.1

This document describes the security content of macOS Big Sur 11.5.1.

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macOS Big Sur 11.5.1

Released July 26, 2021

IOMobileFrameBuffer

Available for: macOS Big Sur

Impact: An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Description: A memory corruption issue was addressed with improved memory handling.

CVE-2021-30807: an anonymous researcher

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