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CVE-2023-5366

18
FAUCET Score

CVE-2023-5366 is a medium-severity flaw in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets to bypass OpenFlow rules, potentially redirecting ICMPv6 traffic. This vulnerability affects various Open vSwitch and Red Hat Enterprise Linux products. A local attacker with low privileges can exploit this with low complexity to achieve high integrity impact by crafting specific packets, but without confidentiality or availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE match
cpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
< 2023-02-28CPE matchmatch criteria
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 87th percentile among its peer group of 15,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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 (12)

microsoftpatch availablevia msrc
Product: azl3 openvswitch 3.3.0-1 on Azure Linux 3.0Fixed in: 3.3.0-1
microsoftpatch availablevia msrc
Product: cbl2 openvswitch 2.17.9-1 on CBL Mariner 2.0Fixed in: 2.17.9-1
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 8Fixed in: openvswitch3.1-0:3.1.0-96.el8fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 9Fixed in: openvswitch2.17-0:2.17.0-131.el9fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 9Fixed in: openvswitch3.2-0:3.2.0-56.el9fdp
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 9Fixed in: openvswitch3.1-0:3.1.0-88.el9fdp
View patch
redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Fast Datapath for Red Hat Enterprise Linux 8Fixed in: openvswitch2.17-0:2.17.0-148.el8fdp
View patch
redhatno patchvia redhat_api
Product: Red Hat Virtualization 4Fixed in: openvswitch2.11
redhatno patchvia redhat_api
Product: Red Hat Virtualization 4Fixed in: redhat-virtualization-host
redhatno patchvia redhat_api
Product: Fast Datapath for RHEL 7Fixed in: openvswitch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: openvswitch

Vendor Advisories (2)

microsoft2023-Oct/CVE-2023-5366Moderate

Openvswitch don't match packets on nd_target field

Oct 10, 2023
redhatCVE-2023-5366Moderate

openvswitch: openvswitch don't match packets on nd_target field

Sep 26, 2023

References

access.redhat.com / security/cve/CVE-2023-5366
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2024/02/msg00004.html
lists.fedoraproject.org / archives/list/[email protected]/message/LFZADABUDOFI2KZIRQBYFZCIKH55RGY3
lists.fedoraproject.org / archives/list/[email protected]/message/VYYUBF6OW2JG7VOFEOROHXGSJCTES3QO
openwall.com / lists/oss-security/2024/02/08/4