dtls1_process_out_of_seq_message(SSL *s, struct hm_header_st* msg_hdr, int *ok)
{
	int i=-1;
	hm_fragment *frag = NULL;
	pitem *item = NULL;
	unsigned char seq64be[8];
	unsigned long frag_len = msg_hdr->frag_len;

	if ((msg_hdr->frag_off+frag_len) > msg_hdr->msg_len)
		goto err;

	/* Try to find item in queue, to prevent duplicate entries */
	memset(seq64be,0,sizeof(seq64be));
	seq64be[6] = (unsigned char) (msg_hdr->seq>>8);
	seq64be[7] = (unsigned char) msg_hdr->seq;
	item = pqueue_find(s->d1->buffered_messages, seq64be);

	/* If we already have an entry and this one is a fragment,
	 * don't discard it and rather try to reassemble it.
	 */
	if (item != NULL && frag_len < msg_hdr->msg_len)
		item = NULL;

	/* Discard the message if sequence number was already there, is
	 * too far in the future, already in the queue or if we received
	 * a FINISHED before the SERVER_HELLO, which then must be a stale
	 * retransmit.
	 */
	if (msg_hdr->seq <= s->d1->handshake_read_seq ||
		msg_hdr->seq > s->d1->handshake_read_seq + 10 || item != NULL ||
		(s->d1->handshake_read_seq == 0 && msg_hdr->type == SSL3_MT_FINISHED))
		{
		unsigned char devnull [256];

		while (frag_len)
			{
			i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
				devnull,
				frag_len>sizeof(devnull)?sizeof(devnull):frag_len,0);
			if (i<=0) goto err;
			frag_len -= i;
			}
		}
	else
		{
		if (frag_len && frag_len < msg_hdr->msg_len)
			return dtls1_reassemble_fragment(s, msg_hdr, ok);

		frag = dtls1_hm_fragment_new(frag_len, 0);
		if ( frag == NULL)
			goto err;

		memcpy(&(frag->msg_header), msg_hdr, sizeof(*msg_hdr));

		if (frag_len)
			{
			/* read the body of the fragment (header has already been read */
			i = s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
				frag->fragment,frag_len,0);
			if (i<=0 || (unsigned long)i!=frag_len)
				goto err;
			}

		memset(seq64be,0,sizeof(seq64be));
		seq64be[6] = (unsigned char)(msg_hdr->seq>>8);
		seq64be[7] = (unsigned char)(msg_hdr->seq);

		item = pitem_new(seq64be, frag);
		if ( item == NULL)
			goto err;

		pqueue_insert(s->d1->buffered_messages, item);
		}

	return DTLS1_HM_FRAGMENT_RETRY;

err:
	if ( frag != NULL) dtls1_hm_fragment_free(frag);
	if ( item != NULL) OPENSSL_free(item);
	*ok = 0;
	return i;
	}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.