Summary: MTE As Implemented

Project Zero reviews pre-production ARM Memory Tagging Extension (MTE) hardware and finds MTE a highly promising mitigation for C/C++ memory-safety vulnerabilities by detecting corruption at the first dangerous access, offering broader impact than many alternatives despite not addressing speculative side-channels. The post argues there is no comparable low-overhead software solution, recommends vendors with substantial C/C++ codebases prioritize MTE support, and links to deeper analyses on implementation testing, user-mode mitigation case studies, and kernel-specific challenges.