libafl

SKILL.md

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