Hacker News — 2026-05-23#
Top Story#
Pardon MIE? Bypassing Apple MIE
The standout post today is a brilliant, highly technical teardown of CVE-2026-28952, revealing how researchers bypassed Apple’s heavily marketed Memory Integrity Enforcement (MIE) on the new M5 silicon. It took a three-person team and an AI assistant just five days to go from zero to a root shell. The vulnerability was a classic integer overflow inside _zalloc_ro_mut—the single trusted kernel function allowed to modify read-only zones—and Apple patched it by simply moving an overflow check two instructions earlier. It’s a perfect reminder that hardware-level memory tagging doesn’t protect you if the authorized gatekeeper can be tricked into writing to the wrong slot.