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Apple's M5 Chip Security Breached in Just 5 Days

Apple's M5 Chip Security Cracked in Record Time

In a stunning cybersecurity breakthrough, researchers from Palo Alto-based Calif have compromised Apple's vaunted M5 chip security in just five days. The attack, which required no code injection, represents the first publicly disclosed exploit of Apple's Memory Integrity Extension (MIE) - a hardware-level protection system developed specifically for the M5 and A19 chip series.

The Race Against Time

The research team's timeline reads like something from a tech thriller:

  • April 25: Initial discovery of two kernel bugs
  • April 27: AI assistant Claude Mythos Preview joins the effort
  • May 1: Complete exploit running on physical M5 devices

"What normally takes months or years was compressed into days," explained lead researcher Bruce Dang. "The combination of human expertise and AI assistance created an unprecedented acceleration in vulnerability discovery."

Bypassing Apple's 'Unbreakable' Defense

MIE, built upon ARM's Memory Tagging Extension technology, was designed as Apple's ultimate memory protection. By assigning 4-bit tags to every 16 bytes of memory, it created what many considered an impenetrable security layer with minimal performance impact (just 3% overhead).

The Calif team shattered this perception by developing a method to predict tag collisions with near-perfect accuracy. "We turned what should be random failures into reliable exploits," said researcher Dion Blazakis. "The scary part? It all happened through pure data manipulation - no code injection needed."

AI: The New Cybersecurity Wildcard

The research highlights AI's growing role in security vulnerabilities. Anthropic's Claude Mythos Preview proved particularly effective at uncovering long-dormant "vintage" bugs across systems. But this cuts both ways - while defenders use AI to find and patch vulnerabilities, attackers increasingly leverage it to discover and exploit them faster.

Apple has already released macOS 26.5 with fixes for these vulnerabilities, but the implications run deeper. As Josh Maine from the research team noted: "We're entering an era where yesterday's 'secure enough' systems might be tomorrow's easy targets."

Key Points:

  • Record time: M5 chip security breached in just five days
  • Novel approach: First pure data-only attack against Apple's hardware protections
  • AI acceleration: Both vulnerability discovery and exploitation times dramatically reduced
  • Current status: Patches available in macOS 26.5 update (users should update immediately)
  • Bigger picture: Signals fundamental shift in cybersecurity landscape with AI involvement