diff --git a/src/eap_peer/eap_pwd.c b/src/eap_peer/eap_pwd.c
index a6294371b..1d2079b02 100644
--- a/src/eap_peer/eap_pwd.c
+++ b/src/eap_peer/eap_pwd.c
@@ -866,11 +866,23 @@ eap_pwd_process(struct eap_sm *sm, void *priv, struct eap_method_ret *ret,
 	 * if it's the first fragment there'll be a length field
 	 */
 	if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) {
+		if (len < 2) {
+			wpa_printf(MSG_DEBUG,
+				   "EAP-pwd: Frame too short to contain Total-Length field");
+			ret->ignore = TRUE;
+			return NULL;
+		}
 		tot_len = WPA_GET_BE16(pos);
 		wpa_printf(MSG_DEBUG, "EAP-pwd: Incoming fragments whose "
 			   "total length = %d", tot_len);
 		if (tot_len > 15000)
 			return NULL;
+		if (data->inbuf) {
+			wpa_printf(MSG_DEBUG,
+				   "EAP-pwd: Unexpected new fragment start when previous fragment is still in use");
+			ret->ignore = TRUE;
+			return NULL;
+		}
 		data->inbuf = wpabuf_alloc(tot_len);
 		if (data->inbuf == NULL) {
 			wpa_printf(MSG_INFO, "Out of memory to buffer "