diff --git a/sys/netinet/in_pcb.c b/sys/netinet/in_pcb.c
--- a/sys/netinet/in_pcb.c
+++ b/sys/netinet/in_pcb.c
@@ -1336,6 +1336,8 @@
 				faddr = satosin(&CK_STAILQ_FIRST(
 				    &V_in_ifaddrhead)->ia_broadaddr)->sin_addr;
 		}
+	} else if (faddr.s_addr == INADDR_ANY) {
+		return (ENETUNREACH);
 	}
 	if (laddr.s_addr == INADDR_ANY) {
 		error = in_pcbladdr(inp, &faddr, &laddr, cred);
diff --git a/sys/netinet6/in6_pcb.c b/sys/netinet6/in6_pcb.c
--- a/sys/netinet6/in6_pcb.c
+++ b/sys/netinet6/in6_pcb.c
@@ -368,7 +368,10 @@
 		 */
 		if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
 			sin6->sin6_addr = in6addr_loopback;
+	} else if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
+		return (ENETUNREACH);
 	}
+
 	if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0)
 		return (error);