FILE* CreateAndOpenTemporaryShmemFile(FilePath* path, bool executable) {
  FilePath directory;
  if (!GetShmemTempDir(&directory, executable))
    return NULL;

  return CreateAndOpenTemporaryFileInDir(directory, path);
}

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.