If you are talking about the "kernel" in general, then C++ 17 is used as the primary language in the Zircon kernel https://fuchsia.dev/fuchsia-src/development/

If you are talking about the "kernel" in general, then C++ 17 is used as the primary language in the Zircon kernel https://fuchsia.dev/fuchsia-src/development/languages/c-cpp/cxx https://fuchsia.dev/fuchsia-src/development/languages/c-cpp/...