webrtc::MediaStreamTrackInterface* MediaStreamImpl::GetLocalMediaStreamTrack(
    const std::string& label) {
  DCHECK(CalledOnValidThread());
  MediaStreamTrackPtrMap::iterator it = local_tracks_.find(label);
  if (it == local_tracks_.end())
    return NULL;
  MediaStreamTrackPtr stream = it->second;
  return stream.get();
}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.