diff --git a/wpa_supplicant/ctrl_iface_zephyr.c b/wpa_supplicant/ctrl_iface_zephyr.c
index 566381b41..5e17860de 100644
--- a/wpa_supplicant/ctrl_iface_zephyr.c
+++ b/wpa_supplicant/ctrl_iface_zephyr.c
@@ -135,6 +135,13 @@ static void wpa_supplicant_ctrl_iface_receive(int sock, void *eloop_ctx,
 		os_free(buf);
 		return;
 	}
+	if (!res) {
+		eloop_unregister_sock(sock, EVENT_TYPE_READ);
+		wpa_printf(MSG_DEBUG, "ctrl_iface: Peer unexpectedly shut down "
+			   "socket");
+		os_free(buf);
+		return;
+	}
 
 	if ((size_t) res > CTRL_IFACE_MAX_LEN) {
 		wpa_printf(MSG_ERROR, "recvform(ctrl_iface): input truncated");