CVE-2023-1668: Cloudbase Open Vswitch

High severity, CVSS 8.2. EPSS: 1.2% chance of exploitation in the next 30 days.

A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.

Affected products

• Cloudbase Open Vswitch: from 1.5.0, before 2.13.11 (fixed in 2.13.11); from 2.14.0, before 2.14.9 (fixed in 2.14.9); from 2.15.0, before 2.15.8 (fixed in 2.15.8); from 2.16.0, before 2.16.7 (fixed in 2.16.7); from 2.17.0, before 2.17.6 (fixed in 2.17.6); from 3.0.0, before 3.0.4 (fixed in 3.0.4); …
• Debian Debian Linux: version 11.0 only
• Red Hat Fast Datapath: affected versions not specified
• Red Hat Openshift Container Platform: version 4.0 only
• Red Hat Openstack Platform: version 16.1 only; version 16.2 only; version 17.0 only
• Red Hat Virtualization: version 4.0 only

Published 2023-04-10. Last modified 2026-06-17.