Code:  SPL_METHOD(RecursiveDirectoryIterator, getSubPath)
 {
 	spl_filesystem_object *intern = (spl_filesystem_object*)zend_object_store_get_object(getThis() TSRMLS_CC);
 	if (zend_parse_parameters_none() == FAILURE) {
 		return;
 	}

	if (intern->u.dir.sub_path) {
		RETURN_STRINGL(intern->u.dir.sub_path, intern->u.dir.sub_path_len, 1);
	} else {
		RETURN_STRINGL("", 0, 1);
	}
}

Vulnerability Type: DoS Overflow 
CWE ID: CWE-190
Summary: Integer overflow in the SplFileObject::fread function in spl_directory.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large integer argument, a related issue to CVE-2016-5096.
Commit Message: Fix bug #72262 - do not overflow int