diff --git a/wolfcrypt/src/aes.c b/wolfcrypt/src/aes.c
index 2fbfd84263..cb4258e634 100644
--- a/wolfcrypt/src/aes.c
+++ b/wolfcrypt/src/aes.c
@@ -10360,6 +10360,9 @@ static WARN_UNUSED_RESULT int wc_AesGcmDecrypt_STM32(
 
     ret = wolfSSL_CryptHwMutexLock();
     if (ret != 0) {
+        if (wasAlloc) {
+            XFREE(authInPadded, aes->heap, DYNAMIC_TYPE_TMP_BUFFER);
+        }
         return ret;
     }