ARM MTE: Hardware Tagging Catches 70% of Memory Bugs in C/C++

ARM's Memory Tagging Extension (MTE) tags memory granules with 4-bit colors and checks on every access, catching spatial and temporal memory bugs. It runs in production with low overhead, targeting the 70% of serious vulnerabilities in C/C++ code. MTE is probabilistic but makes exploits unreliable, and is already shipping in ARMv9 CPUs.