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Fencer Vulns
high 7.1

CVE-2023-5366 json

Openvswitch don't match packets on nd_target field

published 2023-10-06 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-57682

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

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.

Patch / fix

  • openvswitch openvswitch 2023-02-28
  • openvswitch Debian 12 3.1.0-2+deb12u1
  • openvswitch Debian 14, Debian 13 3.1.2-1

debian advisories DEBIAN-CVE-2023-5366

  • openvswitch Ubuntu 20.04 LTS 2.13.8-0ubuntu1.4
  • openvswitch Ubuntu 22.04 LTS 2.17.9-0ubuntu0.22.04.1

ubuntu advisories UBUNTU-CVE-2023-5366

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openvswitch3.1 RHEL 9 3.1.0-88.el9fdp
  • openvswitch3.1-test RHEL 9 3.1.0-88.el9fdp
  • openvswitch3.1-ipsec RHEL 9 3.1.0-88.el9fdp
  • python3-openvswitch3.1 RHEL 9 3.1.0-88.el9fdp
  • openvswitch3.1 RHEL 8 3.1.0-96.el8fdp
  • openvswitch3.1-test RHEL 8 3.1.0-96.el8fdp
  • openvswitch3.1-ipsec RHEL 8 3.1.0-96.el8fdp
  • python3-openvswitch3.1 RHEL 8 3.1.0-96.el8fdp

red hat advisories RHSA-2024:1227RHSA-2024:1235RHSA-2024:1234RHBA-2024:1228RHBA-2024:1226

  • openvswitch3 SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 3.1.7-150500.3.25.1
  • openvswitch SLES for SAP 15 SP6, SLES 15 SP6-LTSS, openSUSE Leap 15.6 3.1.7-150600.33.9.1
  • openvswitch Linux Micro 6.0 3.1.7-4.1
  • openvswitch Linux Micro 6.1 3.1.7-slfo.1.1_2.1
  • openvswitch SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE High Performance Computing 15 SP3-LTSS +2 more 2.14.2-150300.19.14.1
  • openvswitch SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS +1 more 2.13.2-150200.9.28.1
  • openvswitch SLE Module for Server Applications 15 SP4, SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4 +3 more 2.14.2-150400.24.17.1
  • openvswitch3 SLE Module for Server Applications 15 SP5, openSUSE Leap 15.5 3.1.0-150500.3.11.1

suse advisories SUSE-SU-2026:0290-1SUSE-SU-2026:0280-1SUSE-SU-2026:20049-1SUSE-SU-2026:20061-1SUSE-SU-2023:4714-1SUSE-SU-2023:4666-1

  • openvswitch openSUSE Tumbleweed 3.1.0-18.1

opensuse advisories openSUSE-SU-2024:13657-1

  • openvswitch Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 2.17.9-r0

alpine advisories ALPINE-CVE-2023-5366

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openvswitch CBL-Mariner 2.0 2.17.9-1
  • openvswitch Azure Linux 3.0 3.3.0-1

azure linux advisories AZL-31280AZL-35087

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-5366 updated cvss 5.5

openvswitch: openvswitch don't match packets on nd_target field

  • Red Hat Fast Datapath for RHEL 7 openvswitch, openvswitch2.10, openvswitch2.11, openvswitch2.12, openvswitch2.13, openvswitch2.15, +20 more
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Fast Datapath for RHEL 8 openvswitch2.11, openvswitch2.12, openvswitch2.13, openvswitch2.15, openvswitch2.16, openvswitch2.11-test, +17 more Red Hat Fast Datapath for RHEL 9 openvswitch3.0, openvswitch3.0-test, openvswitch3.0-ipsec, python3-openvswitch3.0
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 openvswitch, openvswitch-test, python-openvswitch, openvswitch-controller
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 3.11 openvswitch-ovn-kubernetes
    affected: no fix planned “Out of support scope”
  • Red Hat Virtualization 4 openvswitch2.11, openvswitch2.11-test, python-openvswitch2.11, redhat-virtualization-host-image-update
    affected: no fix available
  • Red Hat Fast Datapath for Red Hat Enterprise Linux 8 openvswitch3.1 3.1.0-96.el8fdp, openvswitch2.17 2.17.0-148.el8fdp, openvswitch3.1-test 3.1.0-96.el8fdp, openvswitch3.1-ipsec 3.1.0-96.el8fdp, openvswitch2.17-test 2.17.0-148.el8fdp, python3-openvswitch3.1 3.1.0-96.el8fdp, +4 more
    fixed: vendor fix RHSA-2024:1234
  • Red Hat Fast Datapath for Red Hat Enterprise Linux 9 openvswitch3.1 3.1.0-88.el9fdp, openvswitch3.2 3.2.0-56.el9fdp, openvswitch2.17 2.17.0-131.el9fdp, openvswitch3.1-test 3.1.0-88.el9fdp, openvswitch3.2-test 3.2.0-56.el9fdp, openvswitch3.1-ipsec 3.1.0-88.el9fdp, +6 more
    fixed: vendor fix RHBA-2024:1226
  • Red Hat OpenStack Platform 16.1 rhosp-ovn, rhosp-ovn-host, rhosp-ovn-vtep, rhosp-openvswitch, rhosp-ovn-central, python3-rhosp-openvswitch Red Hat OpenStack Platform 16.2 rhosp-ovn, rhosp-ovn-host, rhosp-ovn-vtep, rhosp-openvswitch, rhosp-ovn-central, python3-rhosp-openvswitch, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected products

  • n/a openvswitch
  • Red Hat Fast Datapath for RHEL 7
  • Red Hat Fast Datapath for RHEL 8
  • Red Hat Fast Datapath for RHEL 9
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat OpenShift Container Platform 3.11
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenStack Platform 16.1
  • Red Hat Red Hat OpenStack Platform 16.2
  • Red Hat Red Hat Virtualization 4
  • Fedora Fedora

Classification

Weakness
  • CWE-345 Insufficient Verification of Data Authenticity

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.