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CVE-2023-1668

25
FAUCET Score

CVE-2023-1668 is a high-severity flaw in Open vSwitch (OVS) that affects cloudbase, Debian, and Red Hat distributions. When OVS processes an IP packet with protocol 0, it incorrectly installs a datapath flow that can lead to misrouting or mishandling of other IP packets. This vulnerability has a CVSS score of 8.2 (High), indicating it can be exploited remotely with low complexity, potentially leading to a high impact on availability and a low impact on confidentiality. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.5.0, < 2.13.11CPE matchmatch criteria
cpe:2.3:a:cloudbase:open_vswitch:*:*:*:*:*:*:*:*
>= 2.14.0, < 2.14.9CPE matchmatch criteria
cpe:2.3:a:cloudbase:open_vswitch:*:*:*:*:*:*:*:*
>= 2.15.0, < 2.15.8CPE matchmatch criteria
cpe:2.3:a:cloudbase:open_vswitch:*:*:*:*:*:*:*:*
>= 2.16.0, < 2.16.7CPE matchmatch criteria
cpe:2.3:a:cloudbase:open_vswitch:*:*:*:*:*:*:*:*
>= 2.17.0, < 2.17.6CPE matchmatch criteria
cpe:2.3:a:cloudbase:open_vswitch:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.22%
Probability of exploitation in next 30 days
EPSS Percentile
65.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0122 is in the 44th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (17)

microsoftpatch availablevia msrc
Product: cbl2 openvswitch 2.17.5-2 on CBL Mariner 2.0Fixed in: 2.17.5-2
microsoftpatch availablevia msrc
Product: azl3 openvswitch 2.17.5-3 on Azure Linux 3.0Fixed in: 2.17.5-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 2.17.5-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 2.17.5-2
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 2.17.5-3
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 2.17.5-3
microsoftpatch availablevia msrc
Product: 18385-16823Fixed in: 2.17.5-2
microsoftpatch availablevia msrc
Product: 18386-17084Fixed in: 2.17.5-3
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 9Fixed in: openvswitch3.1-0:3.1.0-14.el9fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 9Fixed in: openvswitch2.17-0:2.17.0-77.el9fdp
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: redhat-virtualization-host-0:4.5.3-202306050942_8.6
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 8Fixed in: openvswitch2.17-0:2.17.0-88.el8fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 8Fixed in: openvswitch3.1-0:3.1.0-17.el8fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 8Fixed in: openvswitch2.13-0:2.13.0-214.el8fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 8Fixed in: openvswitch2.15-0:2.15.0-136.el8fdp
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openvswitch2.17
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openvswitch3.1

Vendor Advisories (3)

microsoft2024-Jun/CVE-2023-1668

CVE-2023-1668

Jun 11, 2024
microsoft2023-Apr/CVE-2023-1668Important

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.

Apr 11, 2023
redhatCVE-2023-1668Moderate

openvswitch: ip proto 0 triggers incorrect handling

Apr 6, 2023

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2023/05/msg00000.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/V2GUNS3WSJG4TUDKZ5L7FXGJMVOD6EJZ
security.gentoo.org / glsa/202311-16
debian.org / security/2023/dsa-5387
Third Party Advisory
openwall.com / lists/oss-security/2023/04/06/1
Mailing ListMitigationPatch