AI “digging holes” + human bypass—this combo punches through macOS’s MIE defenses, and even small teams can flip the table.

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Only five days! Anthropic's confidential Mythos model breaks through Apple's five-year M5 memory defense
The Calif team, running on a Mac with M5, built the first macOS kernel memory corruption exploit chain using Mythos Preview, going from a non-privileged local user to root. The attack chain contains two vulnerabilities and targets macOS 26.4.1 with kernel MIE enabled. This case demonstrates the effective combination of AI vulnerability discovery and expert bypass techniques, showing that small teams can also shake the technical defenses of large vendors.
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