diff --git a/sys/netinet/if_ether.c b/sys/netinet/if_ether.c
--- a/sys/netinet/if_ether.c
+++ b/sys/netinet/if_ether.c
@@ -1479,6 +1479,10 @@
 static void
 arp_iflladdr(void *arg __unused, struct ifnet *ifp)
 {
+	/* if_bridge can update its lladdr during if_vmove(), after we've done
+	 * if_detach_internal()/dom_ifdetach(). */
+	if (ifp->if_afdata[AF_INET] == NULL)
+		return;
 
 	lltable_update_ifaddr(LLTABLE(ifp));
 
diff --git a/sys/netinet6/nd6.c b/sys/netinet6/nd6.c
--- a/sys/netinet6/nd6.c
+++ b/sys/netinet6/nd6.c
@@ -208,6 +208,8 @@
 static void
 nd6_iflladdr(void *arg __unused, struct ifnet *ifp)
 {
+	if (ifp->if_afdata[AF_INET6] == NULL)
+		return;
 
 	lltable_update_ifaddr(LLTABLE6(ifp));
 }