CVE-2023-5366

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of service disruption.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-10-06 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 06:48 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.4% in the next 30 days (EPSS).
• Severity: 7.1 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-10-06 18:15 UTC

Last modified

2026-06-17 06:48 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-345

Record status

Modified

Affected

• Openvswitch < 2023-02-28
• Redhat Openshift Container Platform 4.0
• Redhat Virtualization 4.0
• Redhat Enterprise Linux 7.0
• Redhat Fast Datapath

Attack profile CVSS 3.1 · 7.1

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-5366.md and follow it. Check whether this project is affected by CVE-2023-5366. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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