CVE-2023-5366: Openvswitch

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary IP addresses.

Affected products

• Openvswitch Openvswitch: before 2023-02-28 (fixed in 2023-02-28)
• Red Hat Enterprise Linux: version 7.0 only
• Red Hat Fast Datapath: affected versions not specified
• Red Hat Openshift Container Platform: version 4.0 only
• Red Hat Virtualization: version 4.0 only

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