diff --git a/oslo_utils/netutils.py b/oslo_utils/netutils.py
index ebef117..0ad02fd 100644
--- a/oslo_utils/netutils.py
+++ b/oslo_utils/netutils.py
@@ -123,7 +123,7 @@ def is_valid_cidr(address):
     try:
         # Validate the correct CIDR Address
         netaddr.IPNetwork(address)
-    except netaddr.AddrFormatError:
+    except (TypeError, netaddr.AddrFormatError):
         return False
 
     # Prior validation partially verify /xx part
diff --git a/oslo_utils/tests/test_netutils.py b/oslo_utils/tests/test_netutils.py
index d80f6b7..9b15d61 100644
--- a/oslo_utils/tests/test_netutils.py
+++ b/oslo_utils/tests/test_netutils.py
@@ -190,6 +190,7 @@ class NetworkUtilsTest(test_base.BaseTestCase):
 
         self.assertFalse(netutils.is_valid_cidr('10.0.0.1'))
         self.assertFalse(netutils.is_valid_cidr('10.0.0.1/33'))
+        self.assertFalse(netutils.is_valid_cidr(10))
 
     def test_valid_port(self):
         valid_inputs = [1, '1', 2, '3', '5', 8, 13, 21,