A flaw was found in Open Virtual Network where the service monitor MAC does not properly rate limit. This issue could allow an attacker to cause a denial of service, including on deployments with CoPP enabled and properly configured.
https://mail.openvswitch.org/pipermail/ovs-dev/2023-August/407553.html
https://mail.openvswitch.org/pipermail/ovs-announce/2023-August/000327.html
https://github.com/ovn-org/ovn/issues/198
https://github.com/ovn-org/ovn/commit/9a3f7ed905e525ebdcb14541e775211cbb0203bd