diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index 4bb610bc64..ecdf7c2008 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -11638,7 +11638,6 @@ queued_ip6_config_change (gpointer user_data)
 {
 	NMDevice *self = user_data;
 	NMDevicePrivate *priv;
-	GSList *iter;
 	gboolean need_ipv6ll = FALSE;
 	NMPlatform *platform;
 
@@ -11671,20 +11670,17 @@ queued_ip6_config_change (gpointer user_data)
 	    && (platform = nm_device_get_platform (self))
 	    && nm_platform_link_get (platform, priv->ifindex)) {
 		/* Handle DAD failures */
-		for (iter = priv->dad6_failed_addrs; iter; iter = iter->next) {
-			const NMPObject *obj = iter->data;
-			const NMPlatformIP6Address *addr = NMP_OBJECT_CAST_IP6_ADDRESS (obj);
-			const NMPlatformIP6Address *addr2;
+		while (priv->dad6_failed_addrs) {
+			nm_auto_nmpobj const NMPObject *obj = NULL;
+			const NMPlatformIP6Address *addr;
 
-			addr2 = NMP_OBJECT_CAST_IP6_ADDRESS (nm_platform_lookup_obj (platform,
-			                                                             NMP_CACHE_ID_TYPE_OBJECT_TYPE,
-			                                                             obj));
-			if (   addr2
-			    && (   NM_FLAGS_HAS (addr2->n_ifa_flags, IFA_F_TEMPORARY)
-			        || !NM_FLAGS_HAS (addr2->n_ifa_flags, IFA_F_DADFAILED))) {
-				/* the address still/again exists and is not in DADFAILED state. Skip it. */
+			obj = priv->dad6_failed_addrs->data;
+			priv->dad6_failed_addrs = g_slist_delete_link (priv->dad6_failed_addrs, priv->dad6_failed_addrs);
+
+			if (!nm_ndisc_dad_addr_is_fail_candidate (platform, obj))
 				continue;
-			}
+
+			addr = NMP_OBJECT_CAST_IP6_ADDRESS (obj);
 
 			_LOGI (LOGD_IP6, "ipv6: duplicate address check failed for the %s address",
 			       nm_platform_ip6_address_to_string (addr, NULL, 0));
@@ -11705,11 +11701,11 @@ queued_ip6_config_change (gpointer user_data)
 
 		if (need_ipv6ll)
 			check_and_add_ipv6ll_addr (self);
+	} else {
+		g_slist_free_full (priv->dad6_failed_addrs, (GDestroyNotify) nmp_object_unref);
+		priv->dad6_failed_addrs = NULL;
 	}
 
-	g_slist_free_full (priv->dad6_failed_addrs, (GDestroyNotify) nmp_object_unref);
-	priv->dad6_failed_addrs = NULL;
-
 	/* Check if DAD is still pending */
 	if (   priv->ip6_state == IP_CONF
 	    && priv->dad6_ip6_config
@@ -11763,11 +11759,9 @@ device_ipx_changed (NMPlatform *platform,
 	case NMP_OBJECT_TYPE_IP6_ADDRESS:
 		addr = platform_object;
 
-		if (   !NM_FLAGS_HAS (addr->n_ifa_flags, IFA_F_TEMPORARY)
-		    && priv->state > NM_DEVICE_STATE_DISCONNECTED
+		if (   priv->state > NM_DEVICE_STATE_DISCONNECTED
 		    && priv->state < NM_DEVICE_STATE_DEACTIVATING
-		    && (   (change_type == NM_PLATFORM_SIGNAL_CHANGED && addr->n_ifa_flags & IFA_F_DADFAILED)
-		        || (change_type == NM_PLATFORM_SIGNAL_REMOVED && addr->n_ifa_flags & IFA_F_TENTATIVE))) {
+		    && nm_ndisc_dad_addr_is_fail_candidate_event (change_type, addr)) {
 			priv->dad6_failed_addrs = g_slist_prepend (priv->dad6_failed_addrs,
 			                                           (gpointer) nmp_object_ref (NMP_OBJECT_UP_CAST (addr)));
 		}
diff --git a/src/ndisc/nm-ndisc.h b/src/ndisc/nm-ndisc.h
index 3cbb8f5000..9a8a27d7af 100644
--- a/src/ndisc/nm-ndisc.h
+++ b/src/ndisc/nm-ndisc.h
@@ -27,6 +27,9 @@
 #include "nm-setting-ip6-config.h"
 #include "NetworkManagerUtils.h"
 
+#include "platform/nm-platform.h"
+#include "platform/nmp-object.h"
+
 #define NM_TYPE_NDISC            (nm_ndisc_get_type ())
 #define NM_NDISC(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), NM_TYPE_NDISC, NMNDisc))
 #define NM_NDISC_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), NM_TYPE_NDISC, NMNDiscClass))
@@ -184,4 +187,32 @@ NMPlatform *nm_ndisc_get_platform (NMNDisc *self);
 NMPNetns *nm_ndisc_netns_get (NMNDisc *self);
 gboolean nm_ndisc_netns_push (NMNDisc *self, NMPNetns **netns);
 
+static inline gboolean
+nm_ndisc_dad_addr_is_fail_candidate_event (NMPlatformSignalChangeType change_type,
+                                           const NMPlatformIP6Address *addr)
+{
+	return    !NM_FLAGS_HAS (addr->n_ifa_flags, IFA_F_TEMPORARY)
+	       && (   (change_type == NM_PLATFORM_SIGNAL_CHANGED && addr->n_ifa_flags & IFA_F_DADFAILED)
+	           || (change_type == NM_PLATFORM_SIGNAL_REMOVED && addr->n_ifa_flags & IFA_F_TENTATIVE));
+}
+
+static inline gboolean
+nm_ndisc_dad_addr_is_fail_candidate (NMPlatform *platform,
+                                     const NMPObject *obj)
+{
+	const NMPlatformIP6Address *addr;
+
+	addr = NMP_OBJECT_CAST_IP6_ADDRESS (nm_platform_lookup_obj (platform,
+	                                                            NMP_CACHE_ID_TYPE_OBJECT_TYPE,
+	                                                            obj));
+	if (   addr
+	    && (   NM_FLAGS_HAS (addr->n_ifa_flags, IFA_F_TEMPORARY)
+	        || !NM_FLAGS_HAS (addr->n_ifa_flags, IFA_F_DADFAILED))) {
+		/* the address still/again exists and is not in DADFAILED state. Skip it. */
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
 #endif /* __NETWORKMANAGER_NDISC_H__ */
diff --git a/src/nm-iface-helper.c b/src/nm-iface-helper.c
index c270333894..68bc1beada 100644
--- a/src/nm-iface-helper.c
+++ b/src/nm-iface-helper.c
@@ -33,6 +33,8 @@
 #include <signal.h>
 #include <linux/rtnetlink.h>
 
+#include "nm-utils/nm-c-list.h"
+
 #include "main-utils.h"
 #include "NetworkManagerUtils.h"
 #include "platform/nm-linux-platform.h"
@@ -55,6 +57,9 @@
 static struct {
 	GMainLoop *main_loop;
 	int ifindex;
+
+	guint dad_failed_id;
+	CList dad_failed_lst_head;
 } gl/*obal*/ = {
 	.ifindex = -1,
 };
@@ -316,19 +321,58 @@ do_early_setup (int *argc, char **argv[])
 	return TRUE;
 }
 
+typedef struct {
+	NMPlatform *platform;
+	NMNDisc *ndisc;
+} DadFailedHandleData;
+
+static gboolean
+dad_failed_handle_idle (gpointer user_data)
+{
+	DadFailedHandleData *data = user_data;
+	NMCListElem *elem;
+
+	while ((elem = c_list_first_entry (&gl.dad_failed_lst_head, NMCListElem, lst))) {
+		nm_auto_nmpobj const NMPObject *obj = elem->data;
+
+		nm_c_list_elem_free (elem);
+
+		if (nm_ndisc_dad_addr_is_fail_candidate (data->platform, obj)) {
+			nm_ndisc_dad_failed (data->ndisc,
+			                     &NMP_OBJECT_CAST_IP6_ADDRESS (obj)->address);
+		}
+	}
+
+	gl.dad_failed_id = 0;
+	return G_SOURCE_REMOVE;
+}
+
 static void
 ip6_address_changed (NMPlatform *platform,
                      int obj_type_i,
                      int iface,
-                     NMPlatformIP6Address *addr,
+                     const NMPlatformIP6Address *addr,
                      int change_type_i,
                      NMNDisc *ndisc)
 {
 	const NMPlatformSignalChangeType change_type = change_type_i;
+	DadFailedHandleData *data;
 
-	if (   (change_type == NM_PLATFORM_SIGNAL_CHANGED && addr->n_ifa_flags & IFA_F_DADFAILED)
-	    || (change_type == NM_PLATFORM_SIGNAL_REMOVED && addr->n_ifa_flags & IFA_F_TENTATIVE))
-		nm_ndisc_dad_failed (ndisc, &addr->address);
+	if (!nm_ndisc_dad_addr_is_fail_candidate_event (change_type, addr))
+		return;
+
+	c_list_link_tail (&gl.dad_failed_lst_head,
+	                  &nm_c_list_elem_new_stale ((gpointer) nmp_object_ref (NMP_OBJECT_UP_CAST (addr)))->lst);
+	if (gl.dad_failed_id)
+		return;
+
+	data = g_slice_new (DadFailedHandleData);
+	data->platform = platform;
+	data->ndisc = ndisc;
+	gl.dad_failed_id = g_idle_add_full (G_PRIORITY_DEFAULT_IDLE,
+	                                    dad_failed_handle_idle,
+	                                    data,
+	                                    nm_g_slice_free_fcn (DadFailedHandleData));
 }
 
 int
@@ -346,6 +390,8 @@ main (int argc, char *argv[])
 	guint sd_id;
 	char sysctl_path_buf[NM_UTILS_SYSCTL_IP_CONF_PATH_BUFSIZE];
 
+	c_list_init (&gl.dad_failed_lst_head);
+
 	setpgid (getpid (), getpid ());
 
 	if (!do_early_setup (&argc, &argv))
@@ -526,6 +572,9 @@ main (int argc, char *argv[])
 
 	g_main_loop_run (gl.main_loop);
 
+	nm_clear_g_source (&gl.dad_failed_id);
+	nm_c_list_elem_free_all (&gl.dad_failed_lst_head, (GDestroyNotify) nmp_object_unref);
+
 	if (pidfile && wrote_pidfile)
 		unlink (pidfile);