int Instance::GetInitialPage(const std::string& url) {
  size_t found_idx = url.find('#');
  if (found_idx == std::string::npos)
    return -1;

  const std::string& ref = url.substr(found_idx + 1);
  std::vector<std::string> fragments;
  Tokenize(ref, kDelimiters, &fragments);

  int page = -1;

  if ((fragments.size() == 1) && (fragments[0].find('=') == std::string::npos))
    return engine_->GetNamedDestinationPage(fragments[0]);

  for (size_t i = 0; i < fragments.size(); ++i) {
    std::vector<std::string> key_value;
    base::SplitString(fragments[i], '=', &key_value);
    if (key_value.size() != 2)
      continue;
    const std::string& key = key_value[0];
    const std::string& value = key_value[1];

    if (base::strcasecmp(kPage, key.c_str()) == 0) {
      int page_value = -1;
      if (base::StringToInt(value, &page_value) && page_value > 0)
        page = page_value - 1;
      continue;
    }
    if (base::strcasecmp(kNamedDest, key.c_str()) == 0) {
      int page_value = engine_->GetNamedDestinationPage(value);
      if (page_value >= 0)
        page = page_value;
      continue;
    }
  }
  return page;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.