static void ssh2_pkt_defer_noqueue(Ssh ssh, struct Packet *pkt, int noignore)
{
    int len;
    if (ssh->cscipher != NULL && (ssh->cscipher->flags & SSH_CIPHER_IS_CBC) &&
	ssh->deferred_len == 0 && !noignore &&
	!(ssh->remote_bugs & BUG_CHOKES_ON_SSH2_IGNORE)) {
	/*
	 * Interpose an SSH_MSG_IGNORE to ensure that user data don't
	 * get encrypted with a known IV.
	 */
	struct Packet *ipkt = ssh2_pkt_init(SSH2_MSG_IGNORE);
	ssh2_pkt_addstring_start(ipkt);
	ssh2_pkt_defer_noqueue(ssh, ipkt, TRUE);
    }
    len = ssh2_pkt_construct(ssh, pkt);
    if (ssh->deferred_len + len > ssh->deferred_size) {
	ssh->deferred_size = ssh->deferred_len + len + 128;
	ssh->deferred_send_data = sresize(ssh->deferred_send_data,
					  ssh->deferred_size,
					  unsigned char);
    }
    memcpy(ssh->deferred_send_data + ssh->deferred_len, pkt->body, len);
    ssh->deferred_len += len;
    ssh->deferred_data_size += pkt->encrypted_len;
    ssh_free_packet(pkt);
}

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.