---
title: CVE-2023-1668
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2023-1668
---

# CVE-2023-1668

Publication date 10 April 2023

Last updated 18 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**8.2 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2023-1668#impact-score)

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## Description

A flaw was found in openvswitch (OVS). When processing an IP packet with
protocol 0, OVS will install the datapath flow without the action modifying
the IP header. This issue results (for both kernel and userspace datapath)
in installing a datapath flow matching all IP protocols (nw\_proto is
wildcarded) for this flow, but with an incorrect action, possibly causing
incorrect handling of other IP packets with a != 0 IP protocol that matches
this dp flow.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| openvswitch | 26.04 LTS resolute | Fixed 3.1.0-1ubuntu1 |
| 25.10 questing | Fixed 3.1.0-1ubuntu1 |
| 25.04 plucky | Fixed 3.1.0-1ubuntu1 |
| 24.10 oracular | Fixed 3.1.0-1ubuntu1 |
| 24.04 LTS noble | Fixed 3.1.0-1ubuntu1 |
| 23.10 mantic | Fixed 3.1.0-1ubuntu1 |
| 23.04 lunar | Fixed 3.1.0-1ubuntu1 |
| 22.10 kinetic | Fixed 3.0.3-0ubuntu0.22.10.3 |
| 22.04 LTS jammy | Fixed 2.17.5-0ubuntu0.22.04.2 |
| 20.04 LTS focal | Fixed 2.13.8-0ubuntu1.2 |
| 18.04 LTS bionic | Fixed 2.9.8-0ubuntu0.18.04.5 |
| 16.04 LTS xenial | Needs evaluation |
| 14.04 LTS trusty | Ignored end of standard support |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2023-1668#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| openvswitch | * Upstream:   [9d84092](https://github.com/openvswitch/ovs/commit/9d840923d32124fe427de76e8234c49d64e4bb77) * Upstream:   [61b39d8](https://github.com/openvswitch/ovs/commit/61b39d8c4797f1b668e4d5e5350d639fca6082a9) * Upstream:   [0ec9af2](https://github.com/openvswitch/ovs/commit/0ec9af260ad84225e758d249fa32151ddf8a6520) * Upstream:   [27fb5db](https://github.com/openvswitch/ovs/commit/27fb5db7f727ffc056f024f9ba4936facccb5f40) * Upstream:   [42f2b4b](https://github.com/openvswitch/ovs/commit/42f2b4b9b9a3c11d38f180bf1e35c47b77cd4ce8) * Upstream:   [f36509f](https://github.com/openvswitch/ovs/commit/f36509fd64e339ffd33593451099be6baa12ffe6) * Upstream:   [b46505f](https://github.com/openvswitch/ovs/commit/b46505f4d26cd4612a533687e7884efcb7a74111) * Upstream:   [7fa0106](https://github.com/openvswitch/ovs/commit/7fa0106e8594c34f9e16efd87a58e38a947c6c5b) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.2 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | Low |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.2 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1668)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-1668)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2023-1668)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2023-1668)

### Related Ubuntu Security Notices (USN)

+ [USN-6068-1](https://usn.ubuntu.com/USN-6068-1)
+ Open vSwitch vulnerability
+ 10 May 2023

### Other references

* <https://www.openwall.com/lists/oss-security/2023/04/06/1>
* <https://www.cve.org/CVERecord?id=CVE-2023-1668>