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Fencer Vulns
high 8.2

CVE-2023-1668 json

A flaw was found in openvswitch (OVS).

published 2023-04-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23896

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

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.

Patch / fix

  • cloudbase open_vswitch 2.13.11, 2.14.9, 2.15.8, 2.16.7, 2.17.6, 3.0.4
  • openvswitch Debian 14, Debian 13, Debian 12 3.1.0-2

debian advisories DEBIAN-CVE-2023-1668

  • openvswitch Ubuntu 18.04 LTS 2.9.8-0ubuntu0.18.04.5
  • openvswitch Ubuntu 20.04 LTS 2.13.8-0ubuntu1.2
  • openvswitch Ubuntu 22.04 LTS 2.17.5-0ubuntu0.22.04.2

ubuntu advisories UBUNTU-CVE-2023-1668

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

  • redhat-virtualization-host rhev hypervisor 4.4 4.5.3-202306050942_8.6
  • redhat-virtualization-host-image-update rhev hypervisor 4.4 4.5.3-202306050942_8.6
  • openvswitch2.17 RHEL 8 2.17.0-88.el8fdp
  • openvswitch2.17-test RHEL 8 2.17.0-88.el8fdp
  • openvswitch2.17-ipsec RHEL 8 2.17.0-88.el8fdp
  • python3-openvswitch2.17 RHEL 8 2.17.0-88.el8fdp
  • network-scripts-openvswitch2.17 RHEL 8 2.17.0-88.el8fdp
  • openvswitch2.15 RHEL 8 2.15.0-136.el8fdp

red hat advisories RHSA-2023:3491RHSA-2023:1765RHSA-2023:1824RHSA-2023:1823RHSA-2023:1770RHSA-2023:1766

  • 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 SLES for SAP 12 SP5, SLES 12 SP5 2.11.5-3.18.2
  • openvswitch3 SLE Module for Server Applications 15 SP5, openSUSE Leap 15.5 3.1.0-150500.3.3.1
  • openvswitch SLE Module for Server Applications 15 SP4, SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4 +3 more 2.14.2-150400.24.9.1
  • openvswitch SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Real Time 15 SP3 +5 more 2.14.2-150300.19.8.1
  • openvswitch SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLE High Performance Computing 15 SP2-LTSS +2 more 2.13.2-150200.9.22.1

suse advisories SUSE-SU-2026:0290-1SUSE-SU-2026:0280-1SUSE-SU-2023:2621-1SUSE-SU-2023:2536-1SUSE-SU-2023:2296-1SUSE-SU-2023:2275-1

  • openvswitch openSUSE Tumbleweed 3.1.0-14.1

opensuse advisories openSUSE-SU-2024:12942-1

  • openvswitch Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 2.17.6-r0
  • openvswitch Alpine 3.24, Alpine 3.23, Alpine 3.22 +4 more 2.17.8-r0

alpine advisories ALPINE-CVE-2023-1668

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 2.17.5-2
  • openvswitch Azure Linux 3.0 2.17.5-3

azure linux advisories AZL-26031AZL-35088

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-2023-1668 updated cvss 8.2

openvswitch: ip proto 0 triggers incorrect handling

  • Red Hat Fast Datapath for RHEL 7 openvswitch, openvswitch2.10, openvswitch2.11, openvswitch2.12, openvswitch2.13, openvswitch-test, +19 more Red Hat Fast Datapath for RHEL 8 openvswitch2.11, openvswitch2.12, openvswitch2.16, openvswitch2.11-test, openvswitch2.12-test, openvswitch2.16-test, +7 more Red Hat Fast Datapath for RHEL 9 openvswitch3.0, openvswitch3.0-test, openvswitch3.0-ipsec, python3-openvswitch3.0 Red Hat Enterprise Linux 7 openvswitch, openvswitch-test, python-openvswitch, openvswitch-controller Red Hat OpenShift Container Platform 3.11 openvswitch-ovn-kubernetes
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 4 openvswitch3.1, openvswitch2.15, openvswitch2.17, openvswitch3.1-test, openvswitch2.15-test, openvswitch2.17-test, +8 more
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 13 (Queens) openvswitch, openvswitch2.11, openvswitch-test, rhosp-openvswitch, python-openvswitch, openvswitch-ovn-host, +13 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Fast Datapath for Red Hat Enterprise Linux 8 openvswitch3.1 3.1.0-17.el8fdp, openvswitch2.17 2.17.0-88.el8fdp, openvswitch2.13 2.13.0-214.el8fdp, openvswitch2.15 2.15.0-136.el8fdp, openvswitch3.1-test 3.1.0-17.el8fdp, openvswitch3.1-ipsec 3.1.0-17.el8fdp, +14 more
    fixed: vendor fix RHSA-2023:1823
  • Red Hat Fast Datapath for Red Hat Enterprise Linux 9 openvswitch3.1 3.1.0-14.el9fdp, openvswitch2.17 2.17.0-77.el9fdp, openvswitch3.1-test 3.1.0-14.el9fdp, openvswitch3.1-ipsec 3.1.0-14.el9fdp, openvswitch2.17-test 2.17.0-77.el9fdp, openvswitch2.17-ipsec 2.17.0-77.el9fdp, +2 more
    fixed: vendor fix RHSA-2023:1769
  • Red Hat Virtualization 4 Hypervisor for RHEL 8 redhat-virtualization-host 4.5.3-202306050942_8.6, redhat-virtualization-host-image-update 4.5.3-202306050942_8.6
    fixed: vendor fix RHSA-2023:3491
  • Red Hat OpenShift Container Platform 4 openvswitch2.16, openvswitch2.16-test, openvswitch2.16-ipsec, python3-openvswitch2.16, network-scripts-openvswitch2.16 Red Hat Virtualization 4 ovirt-openvswitch, ovirt-openvswitch-ovn, ovirt-openvswitch-ipsec, ovirt-python-openvswitch, ovirt-openvswitch-ovn-host, ovirt-openvswitch-ovn-vtep, +2 more Red Hat RHEL 8-based RHEV-H for RHEV 4 (build requirements) redhat-release-virtualization-host 4.5.3-7.el8ev, redhat-release-virtualization-host-content 4.5.3-7.el8ev, redhat-virtualization-host-image-update-placeholder 4.5.3-7.el8ev
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
NVD 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected products

  • n/a openvswitch

Classification

Weakness
  • CWE-670 Always-Incorrect Control Flow Implementation

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.