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Vulnerability record · CVE-2023-5366 · published 6 October 2023

CVE-2023-5366: Openvswitch insufficient verification of data authenticity vulnerability

Openvswitch · Openvswitch

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.

5.5 CVSS 3.1 Medium EPSS 0.39% · top 69.6% CWE-345 · Insufficient verification of data authenticity
5.5CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2024/02/08/4
https://access.redhat.com/security/cve/CVE-2023-5366 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2006347 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/02/msg00004.html
https://lists.fedoraproject.org/archives/list/[email protected]/message/LFZADABUDOFI2KZIRQBYFZCIK
https://lists.fedoraproject.org/archives/list/[email protected]/message/VYYUBF6OW2JG7VOFEOROHXGSJ
http://www.openwall.com/lists/oss-security/2024/02/08/4
https://access.redhat.com/security/cve/CVE-2023-5366 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2006347 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/02/msg00004.html
https://lists.fedoraproject.org/archives/list/[email protected]/message/LFZADABUDOFI2KZIRQBYFZCIK
https://lists.fedoraproject.org/archives/list/[email protected]/message/VYYUBF6OW2JG7VOFEOROHXGSJ

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Source: NIST National Vulnerability Database (record CVE-2023-5366), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.