Does std::find on empty vector cause undefined behaviour?

trying to find an info on what happens if an empty vector used during std::find but didn't had much luck finding any info.

My question is, if an empty vector passed to std::find, is the return value always a nullptr or is it undefined behaviour?

  std::vector<int> someDataContainer;
  auto it = std::find(someDataContainer.begin(), someDataContainer.end(), 1);