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Vulnerability record · CVE-2023-1668 · published 10 April 2023

CVE-2023-1668: Cloudbase open vswitch vulnerability

Cloudbase · Open Vswitch

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.

8.2 CVSS 3.1 High EPSS 1.2% · top 32.6% CWE-670 · CWE-670
8.2CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

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.

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

Affected products

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

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=2137666 Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00000.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2GUNS3WSJG4TUDKZ5L7FXG
https://security.gentoo.org/glsa/202311-16
https://www.debian.org/security/2023/dsa-5387 Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/04/06/1 Mailing ListMitigationPatch
https://bugzilla.redhat.com/show_bug.cgi?id=2137666 Issue TrackingThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00000.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V2GUNS3WSJG4TUDKZ5L7FXG
https://security.gentoo.org/glsa/202311-16
https://www.debian.org/security/2023/dsa-5387 Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/04/06/1 Mailing ListMitigationPatch

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Source: NIST National Vulnerability Database (record CVE-2023-1668), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.