Skip to main content
No exploitation reportedFix available

CVE-2023-5366

No exploitation reported by the sources we read.

  • Published2023-10-06
  • Fixed in2023-02-28
  • WeaknessCWE-345

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary IP addresses.

Timeline

dates in UTC
  1. 2023-10-0618:15CVE publishedNVD

Versions per branch

NVD
Openvswitch
BranchAffectedFixed in
2023.x< 2023-02-282023-02-28
Redhat enterprise linux
BranchAffectedFixed in
7.0= 7.0no fix published
Redhat fast datapathversion to verify
BranchAffectedFixed in
—all versionsno fix published

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openvswitchUbuntu:Pro:18.04:LTSall versions · fixed in 2.9.8-0ubuntu0.18.04.5+esm1
  • openvswitchUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • openvswitchUbuntu:22.04:LTSall versions · fixed in 2.17.9-0ubuntu0.22.04.1
  • openvswitchUbuntu:20.04:LTSall versions · fixed in 2.13.8-0ubuntu1.4
  • openvswitchUbuntu:20.04:LTSall versions · fixed in 2.13.8-0ubuntu1.3
  • openvswitchSUSE:Linux Micro 6.1all versions · fixed in 3.1.7-slfo.1.1_2.1
  • openvswitchSUSE:Linux Micro 6.0all versions · fixed in 3.1.7-4.1
  • openvswitchSUSE:Linux Enterprise Server for SAP Applications 15 SP6all versions · fixed in 3.1.7-150600.33.9.1

65 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-5366 Red Hat Product Security158 products fixed · 84 known affected

    openvswitch: openvswitch don't match packets on nd_target field

    openvswitch as a component of Fast Datapath for RHEL 7 · openvswitch-devel as a component of Fast Datapath for RHEL 7 · openvswitch-ovn-central as a component of Fast Datapath for RHEL 7 · +81 more

  • RHBA-2024:1228 Red Hat Product Security30 products fixed

    Red Hat Bug Fix Advisory: openvswitch3.2 bug fix and enhancement update

  • RHBA-2024:1226 Red Hat Product Security30 products fixed

    Red Hat Bug Fix Advisory: openvswitch2.17 bug fix and enhancement update

Full record on NVD

Fix

  1. Update Openvswitch to 2023-02-28
  2. Vendor fix Red Hat Product Security RHBA-2024:1228 · 30 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security CVE-2023-5366 · 34 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  4. No fix available, says the vendor Red Hat Product Security CVE-2023-5366 · 16 productsAffected
  5. No fix planned, says the vendor Red Hat Product Security CVE-2023-5366 · 64 productsOut of support scope
  6. No fix planned, says the vendor Red Hat Product Security CVE-2023-5366 · 4 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.1known since 2026-10-23
  • NVDCVSS 3.15.5read 2026-10-23
  • CNAweakness (CWE)CWE-345known since 2026-10-23
  • NVDweakness (CWE)CWE-345read 2026-10-23
  • FIRST EPSSEPSS score0.4 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Published
2023-10-06
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-f89w-2cg8-8h78

Frequently asked questions

What is CVE-2023-5366?

A flaw was found in Open vSwitch that allows ICMPv6 Neighbor Advertisement packets between virtual machines to bypass OpenFlow rules. This issue may allow a local attacker to create specially crafted packets with a modified or spoofed target IP address field that can redirect ICMPv6 traffic to arbitrary IP addresses.

Is CVE-2023-5366 actively exploited?

Active exploitation of CVE-2023-5366 has not been confirmed. Its EPSS score was 0.4% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-5366?

CVE-2023-5366 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Running openvswitch? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record