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Modular Rust fuzzing library for building custom fuzzers with fine-grained control over feedback, mutation, and execution. Provides drop-in libFuzzer compatibility mode for existing harnesses, or use as a Rust library to build fully customized fuzzers from scratch Modular component architecture covers observers (coverage, timing), feedback mechanisms, objectives (crashes, timeouts), mutators, schedulers, and in-process executors Supports multi-core fuzzing, dictionary-guided mutations, auto token extraction, crash deduplication via backtrace hashing, and text UI for monitoring Requires LLVM 15-18, Rust toolchain, and compiler wrapper setup for proper instrumentation; includes real-world examples for libpng and CMake projects LibAFL LibAFL is a modular fuzzing library that implements features from AFL-based fuzzers like AFL++. Unlike traditional fuzzers, LibAFL provides all functionality in a modular and customizable way as a Rust library. It can be used as a drop-in replacement for libFuzzer or as a library to build custom fuzzers from scratch. When to Use Fuzzer Best For Complexity libFuzzer Quick setup, single-threaded Low AFL++ Multi-core, general purpose Medium LibAFL Custom fuzzers, advanced features, research High Choose LibAFL when: You need custom mutation strategies or feedback mechanisms Standard fuzzers don't support your target architecture You want to implement novel fuzzing techniques You need fine-grained control over fuzzing components You're conducting fuzzing research
don't have the plugin yet? install it then click "run inline in claude" again.