Red Hat doesn't ship any proprietary module. However, they do list a number of symbols and struct definitions as stable, unlike the upstream kernel, and preserv

Red Hat doesn't ship any proprietary module. However, they do list a number of symbols and struct definitions as stable, unlike the upstream kernel, and preserve them for the life of a RHEL major release. This is why RHEL stays on an old kernel release and backports new features to the old release, instead of releasing new kernels.