bool SharedMemory::Open(const std::string& name, bool read_only) {
  FilePath path;
  if (!FilePathForMemoryName(name, &path))
    return false;

  read_only_ = read_only;

  const char *mode = read_only ? "r" : "r+";
  FILE *fp = file_util::OpenFile(path, mode);
  return PrepareMapFile(fp);
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.