Talos releases new macOS open-source fuzzer

Cisco Talos details a snapshot-based fuzzing workflow for macOS kernel components by extending the WhatTheFuzz framework to load VMware Fusion snapshots, enabling emulated execution with code coverage and crash detection on commodity hardware. The post covers setting up LLDB-based debugging, extracting CPU/memory state via Volatility, configuring breakpoints for crash triage, implementing a fuzzing harness for ip6_input in the IPv6 stack, symbolizing coverage traces, and addressing checksum barriers, with supporting patches and tools released on GitHub.