macOS Kernel Memory Corruption Exploit

The article discusses how Apple's Memory Integrity Enforcement (MIE) on M5 hardware, a hardware-assisted mitigation, was bypassed by a small team using an AI system called Mythos Preview to develop a working macOS kernel memory corruption exploit in under a week. It argues that while such mitigations raise the cost of attacks, they are not absolute, and the speed of AI-driven exploit discovery signals a need for security to evolve beyond a pre-AI threat model.

Comments give me head until i'm dead • May 22, 2026 1:12 AM Once someone told A story about these small desert birds Throwing themselves In thorns when copulating in lustAnd while embraced by death They sing so fine than never And while embraced by death They stay in love foreverLike martyrs do They dedicate their lifes in deep vein Of ancient vows And die of flaring ardour in hazeThorns they lurk on roses stem They do intend no harm themSqueezing me hard In thorns that burn like a fire inside Thrilling my head Until they rip my shivering skinThorns they lurk on roses stem They do intend no harm them They lurk on bodies stem They make my heart arise them Rontea • May 22, 2026 9:59 AM Apple’s introduction of Memory Integrity Enforcement MIE represents a textbook example of raising the cost of attacks by integrating hardware-assisted mitigations. For five years, Apple followed the classic defense-in-depth principle: layering multiple barriers in hardware and software to make memory corruption exploits prohibitively expensive. And yet, as this report demonstrates, no mitigation is absolute. Attackers, augmented by AI systems like Mythos Preview, can now explore the vulnerability space at speeds that outpace traditional human-only approaches. The fact that a small team could develop a working macOS kernel memory corruption exploit on M5 hardware in under a week validates the old adage: attacks only get better. We’re entering a transitional era. Hardware-enforced protections like MIE were designed for a pre-AI threat model. In a world where autonomous systems can rapidly discover and generalize exploit patterns, security will need to evolve again. Mitigations can slow attackers down, but they will not stop them. Subscribe to comments on this entry Leave a comment Sidebar photo of Bruce Schneier by Joe MacInnis.