Apple's M5 chip MIE bypassed by AI-assisted kernel attack code, first public case of memory corruption defense being broken

Security firm Calif says it built the first public macOS kernel memory-corruption exploit on an Apple M5 Mac with Memory Integrity Enforcement enabled.

The exploit reportedly chained two vulnerabilities and used Claude Mythos Preview to help reach root access on macOS 26.4.1.

The finding suggests Apple’s advanced memory protections can still be bypassed by a carefully crafted exploit chain.

It also underscores how AI-assisted vulnerability research is accelerating high-end offensive security work.