diff --git a/pn8x/halimpl/mifare/NxpMfcReader.cc b/pn8x/halimpl/mifare/NxpMfcReader.cc
index 602a2b7..9ee49db 100644
--- a/pn8x/halimpl/mifare/NxpMfcReader.cc
+++ b/pn8x/halimpl/mifare/NxpMfcReader.cc
@@ -349,6 +349,10 @@
       } break;
 
       case eMfcAuthRsp: {
+        if (*pBufflen < 2) {
+          status = NFCSTATUS_FAILED;
+          break;
+        }
         /* check the status byte */
         if (NFCSTATUS_SUCCESS == pBuff[1]) {
           status = NFCSTATUS_SUCCESS;
diff --git a/snxxx/halimpl/mifare/NxpMfcReader.cc b/snxxx/halimpl/mifare/NxpMfcReader.cc
index 83fe1d9..7ac930b 100644
--- a/snxxx/halimpl/mifare/NxpMfcReader.cc
+++ b/snxxx/halimpl/mifare/NxpMfcReader.cc
@@ -353,6 +353,10 @@
       } break;
 
       case eMfcAuthRsp: {
+        if (*pBufflen < 2) {
+          status = NFCSTATUS_FAILED;
+          break;
+        }
         /* check the status byte */
         if (NFCSTATUS_SUCCESS == pBuff[1]) {
           status = NFCSTATUS_SUCCESS;