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libfuzzer

trailofbits/skills

libFuzzer is an in-process, coverage-guided fuzzer that is part of the LLVM project. It's the recommended starting point for fuzzing C/C++ projects due to its simplicity and integration with the LLVM toolchain. While libFuzzer has been in maintenance-only mode since late 2022, it is easier to install and use than its...

Installs746
Install command
npx skills add https://github.com/trailofbits/skills --skill libfuzzer
Security audits
Gen Agent Trust HubPASS
SocketPASS
SnykWARN
About this skill
libFuzzer is an in-process, coverage-guided fuzzer that is part of the LLVM project. It's the recommended starting point for fuzzing C/C++ projects due to its simplicity and integration with the LLVM toolchain. While libFuzzer has been in maintenance-only mode since late 2022, it is easier to install and use than its alternatives, has wide support, and will be maintained for the foreseeable future. Choose libFuzzer when: Note: Fuzzing harnesses written for libFuzzer are compatible with AFL++, making it easy to transition if you need more advanced features like better multi-core support. Compile and run: For the latest LLVM version: Install Clang through Visual Studio. Refer to Microsoft's documentation for setup instructions. Recommendation: If possible, fuzz on a local x86_64 VM or rent one on DigitalOcean, AWS, or Hetzner. Linux provides the best support for libFuzzer.

Source description provided by the upstream skill listing. Community reviews and install context appear in the sections below.

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FAQ
What does libfuzzer do?

libFuzzer is an in-process, coverage-guided fuzzer that is part of the LLVM project. It's the recommended starting point for fuzzing C/C++ projects due to its simplicity and integration with the LLVM toolchain. While libFuzzer has been in maintenance-only mode since late 2022, it is easier to install and use than its...

Is libfuzzer good?

libfuzzer does not have approved reviews yet, so SkillJury cannot publish a community verdict.

What agent does libfuzzer work with?

libfuzzer currently lists compatibility with codex, gemini-cli, opencode, cursor, github-copilot, claude-code.

What are alternatives to libfuzzer?

Skills in the same category include telegram-bot-builder, flutter-app-size, sharp-edges, iterative-retrieval.

How do I install libfuzzer?

npx skills add https://github.com/trailofbits/skills --skill libfuzzer

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