diff --git a/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c b/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c
index 4f8393cb36..613b42149c 100644
--- a/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c
+++ b/NetworkPkg/Dhcp6Dxe/Dhcp6Io.c
@@ -203,6 +203,7 @@ Dhcp6EnqueueRetry (
     //
     // Unexpected message type.
     //
+    FreePool(TxCb);
     return EFI_DEVICE_ERROR;
   }
 
diff --git a/NetworkPkg/Ip4Dxe/Ip4If.c b/NetworkPkg/Ip4Dxe/Ip4If.c
index 53a333037f..348f2e076a 100644
--- a/NetworkPkg/Ip4Dxe/Ip4If.c
+++ b/NetworkPkg/Ip4Dxe/Ip4If.c
@@ -491,9 +491,13 @@ Ip4CreateInterface (
   IP4_INTERFACE             *Interface;
   EFI_SIMPLE_NETWORK_MODE   SnpMode;
 
+  if (Mnp == NULL) {
+    return NULL;
+  }
+
   Interface = AllocatePool (sizeof (IP4_INTERFACE));
 
-  if ((Interface == NULL) || (Mnp == NULL)) {
+  if (Interface == NULL) {
     return NULL;
   }
 
diff --git a/NetworkPkg/TcpDxe/TcpDispatcher.c b/NetworkPkg/TcpDxe/TcpDispatcher.c
index 86beaf8cc5..9ae08ccc1c 100644
--- a/NetworkPkg/TcpDxe/TcpDispatcher.c
+++ b/NetworkPkg/TcpDxe/TcpDispatcher.c
@@ -390,6 +390,7 @@ TcpAttachPcb (
                   );
   if (EFI_ERROR (Status)) {
     IpIoRemoveIp (IpIo, Tcb->IpInfo);
+    FreePool (Tcb);
     return Status;
   }