aflpp

SKILL.md

AFL++

AFL++ is a fork of the original AFL fuzzer that offers better fuzzing performance and more advanced features while maintaining stability. A major benefit over libFuzzer is that AFL++ has stable support for running fuzzing campaigns on multiple cores, making it ideal for large-scale fuzzing efforts.

When to Use

Fuzzer
Best For
Complexity

AFL++
Multi-core fuzzing, diverse mutations, mature projects
Medium

libFuzzer
Quick setup, single-threaded, simple harnesses
Low

LibAFL
Custom fuzzers, research, advanced use cases
High

Choose AFL++ when:

You need multi-core fuzzing to maximize throughput

Your project can be compiled with Clang or GCC

You want diverse mutation strategies and mature tooling

libFuzzer has plateaued and you need more coverage

You're fuzzing production codebases that benefit from parallel execution