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
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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