CVE-2023-3966

HIGH

7.5

CVSS v3

Description

A flaw was found in Open vSwitch where multiple versions are vulnerable to crafted Geneve packets, which may result in a denial of service and invalid memory accesses. Triggering this issue requires that hardware offloading via the netlink path is enabled.

CWE-248

How to fix

Remediation Available

openvswitchDebian

Fixed in:2.15.0+ds1-2+deb11u5CVE-2023-3966

Fixed in:3.1.0-2+deb12u1CVE-2023-3966

Fixed in:3.3.0-1CVE-2023-3966

network-scripts-openvswitch2.17Red Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

network-scripts-openvswitch2.17Rocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

network-scripts-openvswitch3.1Red Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

network-scripts-openvswitch3.1Rocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

openvswitch2.17Rocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17Red Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-debuginfoRed Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-debuginfoRocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-debugsourceRocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-debugsourceRed Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-develRocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-develRed Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-ipsecRocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-ipsecRed Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-testRed Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch2.17-testRocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

openvswitch3.1Rocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1Red Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-debuginfoRocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-debuginfoRed Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-debugsourceRed Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-debugsourceRocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-develRocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-develRed Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-ipsecRocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-ipsecRed Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-testRed Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitch3.1-testRocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

python3-openvswitch2.17Red Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

python3-openvswitch2.17Rocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

python3-openvswitch2.17-debuginfoRed Hat / RHEL

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

python3-openvswitch2.17-debuginfoRocky

Fixed in:0:2.17.0-148.el8fdpRHSA-2024:1234

python3-openvswitch3.1Rocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

python3-openvswitch3.1Red Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

python3-openvswitch3.1-debuginfoRocky

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

python3-openvswitch3.1-debuginfoRed Hat / RHEL

Fixed in:0:3.1.0-96.el8fdpRHSA-2024:1235

Fixed in:0:3.1.0-88.el9fdpRHSA-2024:1227

openvswitchUbuntu

Fixed in:2.13.8-0ubuntu1.4USN-6690-1

Fixed in:2.17.9-0ubuntu0.22.04.1USN-6690-1

Fixed in:3.2.2-0ubuntu0.23.10.1USN-6690-1

openvswitch-commonUbuntu

Fixed in:2.13.8-0ubuntu1.4USN-6690-1

Fixed in:2.17.9-0ubuntu0.22.04.1USN-6690-1

Fixed in:3.2.2-0ubuntu0.23.10.1USN-6690-1

python3-openvswitchUbuntu

Fixed in:2.13.8-0ubuntu1.4USN-6690-1

Fixed in:2.17.9-0ubuntu0.22.04.1USN-6690-1

Fixed in:3.2.2-0ubuntu0.23.10.1USN-6690-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.03%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Third-Party Advisory2

Mailing List2

Related Vulnerabilities

Other CWE-248 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-59538	High	7.5	8.3%	-	Fix
CVE-2021-37714	High	7.5	6.9%	-	Fix
CVE-2025-53366	Unscored	-	6.0%	-	-
CVE-2018-11466	Critical	9.8	4.0%	-	-
CVE-2025-59465	High	7.5	3.6%	-	Fix
CVE-2018-7852	High	7.5	3.6%	-	-

Common questions

How do I fix CVE-2023-3966?

Published advisories record a fix for 40 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-3966 being actively exploited?

Not that we know of. CVE-2023-3966 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 61% of all scored CVEs.

How severe is CVE-2023-3966?

CVE-2023-3966 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-3966 affect?

Published advisories record a fix for openvswitch (Debian), network-scripts-openvswitch2.17 (Red Hat / RHEL), network-scripts-openvswitch2.17 (Rocky), network-scripts-openvswitch3.1 (Red Hat / RHEL), and 36 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-16.