ONOS versions 1.8.0, 1.9.0, and 1.10.0 do not restrict the amount of memory allocated. The Netty payload size is not limited.
Linux foundation ONOS 1.9.0 is vulnerable to a DoS.
ONOS before 1.5.0 when using the ifwd app allows remote attackers to cause a denial of service (NULL pointer dereference and switch disconnect) by sending two Ethernet frames with ether_type Jumbo Frame (0x8870).