diff --git a/core/dp/txrx/ol_rx_defrag.c b/core/dp/txrx/ol_rx_defrag.c
index fc5d50bb061b..5a225e1606e1 100644
--- a/core/dp/txrx/ol_rx_defrag.c
+++ b/core/dp/txrx/ol_rx_defrag.c
@@ -453,6 +453,28 @@ ol_rx_reorder_store_frag(ol_txrx_pdev_handle pdev,
 		return;
 	}
 
+	rx_desc = htt_rx_msdu_desc_retrieve(htt_pdev, frag);
+	qdf_assert(htt_rx_msdu_has_wlan_mcast_flag(htt_pdev, rx_desc));
+	index = htt_rx_msdu_is_wlan_mcast(htt_pdev, rx_desc) ?
+		txrx_sec_mcast : txrx_sec_ucast;
+
+	/*
+	 * Multicast/Broadcast frames should not be fragmented so drop
+	 * such frames.
+	 */
+	if (index != txrx_sec_ucast) {
+		ol_rx_frames_free(htt_pdev, frag);
+		return;
+	}
+
+	if (peer->security[index].sec_type != htt_sec_type_none &&
+	    !htt_rx_mpdu_is_encrypted(htt_pdev, rx_desc)) {
+		ol_txrx_err("Unencrypted fragment received in security mode %d",
+			    peer->security[index].sec_type);
+		ol_rx_frames_free(htt_pdev, frag);
+		return;
+	}
+
 	if ((!more_frag) && (!fragno) && (!rx_reorder_array_elem->head)) {
 		rx_reorder_array_elem->head = frag;
 		rx_reorder_array_elem->tail = frag;