Openvswitch don't match packets on nd_target field

Description

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.

Scores

EPSS (exploitation in 30 days)

0.42% · top 64% of all CVEs (4 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.

Weakness

• CWE-345: Insufficient Verification of Data Authenticity (opens in a new tab)All about CWE-345 and its CVEs

Affected products

• openvswitch

  All versions: affected

• Red Hat · Fast Datapath for RHEL 7

  All versions: affected

• Red Hat · Fast Datapath for RHEL 7

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 7

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 7

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 7

  All versions: affected

• Red Hat · Fast Datapath for RHEL 7

  All versions: affected

• Red Hat · Fast Datapath for RHEL 8

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 8

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 8

  All versions: affected

• Red Hat · Fast Datapath for RHEL 8

  All versions: affected

• Red Hat · Fast Datapath for RHEL 8

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 8

  All versions: affected

• Red Hat · Fast Datapath for RHEL 8

  All versions: affected

• Red Hat · Fast Datapath for RHEL 9

  All versions: affected

• Red Hat · Fast Datapath for RHEL 9

  All versions: unknown

• Red Hat · Fast Datapath for RHEL 9

  All versions: affected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: affected

• Red Hat · Red Hat OpenShift Container Platform 3.11

  All versions: unknown

• Red Hat · Red Hat OpenShift Container Platform 4

  All versions: unknown

• Red Hat · Red Hat OpenShift Container Platform 4

  All versions: affected

• Red Hat · Red Hat OpenShift Container Platform 4

  All versions: affected

• Red Hat · Red Hat OpenShift Container Platform 4

  All versions: affected

• Red Hat · Red Hat OpenShift Container Platform 4

  All versions: affected

• Red Hat · Red Hat OpenStack Platform 16.1

  All versions: unaffected

• Red Hat · Red Hat OpenStack Platform 16.2

  All versions: unaffected

• Red Hat · Red Hat Virtualization 4

  All versions: affected

• Red Hat · Red Hat Virtualization 4

  All versions: affected

• Fedora · Fedora

  All versions: affected

References (6)

• https://access.redhat.com/security/cve/CVE-2023-5366 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
• RHBZ#2006347 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
• http://www.openwall.com/lists/oss-security/2024/02/08/4 (opens in a new tab)x_transferred
• https://lists.debian.org/debian-lts-announce/2024/02/msg00004.html (opens in a new tab)x_transferred
• https://lists.fedoraproject.org/archives/list/[email protected]/message/VYYUBF6OW2JG7VOFEOROHXGSJCTES3QO/ (opens in a new tab)x_transferred
• https://lists.fedoraproject.org/archives/list/[email protected]/message/LFZADABUDOFI2KZIRQBYFZCIKH55RGY3/ (opens in a new tab)x_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-5366](https://trackcve.app/badge/CVE-2023-5366.svg)](https://trackcve.app/cve/CVE-2023-5366)

Record last updated 13 Feb 2025, 17:20 UTC.