int imap_msg_commit(struct Context *ctx, struct Message *msg)
{
  int r = mutt_file_fclose(&msg->fp);
  if (r != 0)
    return r;

  return imap_append_message(ctx, msg);
}

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.