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---
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title: OSS-Fuzz
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---
# OSS-Fuzz
[Fuzz testing](https://en.wikipedia.org/wiki/Fuzz_testing) is a well-known
technique for uncovering programming errors in software.
Many of these detectable errors, like [buffer overflow](https://en.wikipedia.org/wiki/Buffer_overflow), can have serious security implications. Google has found [hundreds](https://bugs.chromium.org/p/chromium/issues/list?can=1&q=label%3AStability-LibFuzzer+-status%3ADuplicate%2CWontFix) of security vulnerabilities and stability bugs by deploying [guided in-process fuzzing of Chrome components](https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html),
and we now want to share that service with the open source community.
In cooperation with the [Core Infrastructure Initiative](https://www.coreinfrastructure.org/),
OSS-Fuzz aims to make common open source software more secure and stable by
combining modern fuzzing techniques with scalable,
distributed execution.
We support the [libFuzzer](http://llvm.org/docs/LibFuzzer.html) and [AFL](http://lcamtuf.coredump.cx/afl/) fuzzing engines
in combination with [Sanitizers](https://github.com/google/sanitizers), as well as
[ClusterFuzz](https://github.com/google/clusterfuzz),
a distributed fuzzer execution environment and reporting tool.
Currently, OSS-Fuzz supports C and C++ code, though other languages supported by [LLVM](http://llvm.org) may work too.
## Trophies
As of August 2019, OSS-Fuzz has found [~14,000] bugs in over [200] open source
projects.
[~14,000]: https://bugs.chromium.org/p/oss-fuzz/issues/list?can=1&q=-status%3AWontFix%2CDuplicate+-Infra
[200]: https://github.com/google/oss-fuzz/tree/master/projects
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