diff --git a/src/evmctl.c b/src/evmctl.c
index b8ba339..ac2e46f 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -1603,7 +1603,7 @@ void ima_ng_show(struct template_entry *entry)
 	total_len -= sizeof(field_len);
 
 	algo = (char *)fieldp;
-	len = strlen(algo) + 1;
+	len = strnlen(algo, field_len - 1) + 1;
 	digest_len = field_len - len;
 	digest = fieldp + len;