Vulnerability-Lookup

UBUNTU-CVE-2026-92542 (CVE-2026-92542)

Vulnerability from osv_ubuntu – Published: 2026-10-08 00:00 – Updated: 2026-10-08 00:00 – Source website

Details

The firewall rules which mark VXLAN datagrams for encryption indiscriminately match both authentic VXLAN datagrams sent from the kernel and forged datagrams sent by user processes. Any packet sent from the host network namespace of a Linux Swarm node is encrypted with the overlay-network IPsec parameters which meets the following criteria: - UDP datagram - Destination port is the Swarm data-path port - Datagram starts with a VXLAN header for the VNI of an encrypted overlay network which any running container on the node is connected to

Severity

6.9 (Medium)


                    
                      CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-92542	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-92542	REPORT
	https://github.com/moby/moby/security/advisories/…	REPORT

JSON

To clipboard

{
  "affected": [
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      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
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          },
          {
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            "binary_version": "18.09.7-0ubuntu1~16.04.9+esm2"
          },
          {
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          "type": "ECOSYSTEM"
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        "18.09.7-0ubuntu1~16.04.9+esm2"
      ]
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        "24.0.7-0ubuntu2~20.04.1",
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        "26.1.3-0ubuntu1~20.04.1+esm1",
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      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
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            "binary_name": "golang-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
          },
          {
            "binary_name": "golang-github-docker-docker-dev",
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
          },
          {
            "binary_name": "vim-syntax-docker",
            "binary_version": "20.10.21-0ubuntu1~22.04.8+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "docker.io",
        "purl": "pkg:deb/ubuntu/docker.io@20.10.21-0ubuntu1~22.04.8+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
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        }
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        "24.0.7-0ubuntu4.1",
        "26.1.3-0ubuntu1~24.04.1",
        "26.1.3-0ubuntu1~24.04.1+esm1",
        "27.5.1-0ubuntu3~24.04.1",
        "27.5.1-0ubuntu3~24.04.2",
        "28.2.2-0ubuntu1~24.04.1",
        "29.1.3-0ubuntu3~24.04.1",
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    {
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        "27.5.1+dfsg4-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "docker.io",
            "binary_version": "29.1.3-0ubuntu4.1"
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        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "docker.io-app",
        "purl": "pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu4.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "28.2.2-0ubuntu1",
        "29.1.2-0ubuntu1",
        "29.1.3-0ubuntu1",
        "29.1.3-0ubuntu2",
        "29.1.3-0ubuntu3",
        "29.1.3-0ubuntu4",
        "29.1.3-0ubuntu4.1"
      ]
    }
  ],
  "aliases": [],
  "details": "The firewall rules which mark VXLAN datagrams for encryption indiscriminately match both authentic VXLAN datagrams sent from the kernel and forged datagrams sent by user processes. Any packet sent from the host network namespace of a Linux Swarm node is encrypted with the overlay-network IPsec parameters which meets the following criteria: - UDP datagram - Destination port is the Swarm data-path port - Datagram starts with a VXLAN header for the VNI of an encrypted overlay network which any running container on the node is connected to",
  "id": "UBUNTU-CVE-2026-92542",
  "modified": "2026-10-08T00:00:00Z",
  "published": "2026-10-08T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-92542"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-92542"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/moby/moby/security/advisories/GHSA-6m9p-4h64-m6vh"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-92542"
  ]
}

CVE-2026-92542 (GCVE-0-2026-92542)

Vulnerability from cvelistv5 – Published: 2026-10-07 16:42 – Updated: 2026-10-07 20:30

Title

Blind VXLAN injection into encrypted overlay networks from cluster peer

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-07 20:30 UTC

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

Docker CNA under the mitre root

CNA scorecard B 88/100 over 32 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/moby/moby/security/advisories/…	vendor-advisory

Impacted products

3 products

Vendor	Product	Version
Docker	Docker Engine	Affected: 0 , < 25.0.19 (semver) Affected: 26.0.0 , < 29.8.2 (semver)
Docker	Docker Engine overlay network driver	Affected: 0 , < v25.0.19 (semver) Affected: v26.0.0 , < * (semver)
Moby	Moby overlay network driver	Affected: v2.0.0-beta.0 , < v2.0.0-beta.25 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-92542",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-07T20:30:27.853237Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-290",
                "description": "CWE-290 Authentication Bypass by Spoofing",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-07T20:30:49.884Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Linux"
          ],
          "product": "Docker Engine",
          "vendor": "Docker",
          "versions": [
            {
              "lessThan": "25.0.19",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "29.8.2",
              "status": "affected",
              "version": "26.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageName": "github.com/docker/docker/libnetwork/drivers/overlay",
          "platforms": [
            "Linux"
          ],
          "product": "Docker Engine overlay network driver",
          "vendor": "Docker",
          "versions": [
            {
              "lessThan": "v25.0.19",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "*",
              "status": "affected",
              "version": "v26.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageName": "github.com/moby/moby/v2/daemon/libnetwork/drivers/overlay",
          "platforms": [
            "Linux"
          ],
          "product": "Moby overlay network driver",
          "vendor": "Moby",
          "versions": [
            {
              "lessThan": "v2.0.0-beta.25",
              "status": "affected",
              "version": "v2.0.0-beta.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Linux Swarm nodes participating in an encrypted overlay network"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The firewall rules which mark VXLAN datagrams for encryption indiscriminately match both authentic VXLAN datagrams sent from the kernel and forged datagrams sent by user processes. Any packet sent from the host network namespace of a Linux Swarm node is encrypted with the overlay-network IPsec parameters which meets the following criteria:\n\n- UDP datagram\n- Destination port is the Swarm data-path port\n- Datagram starts with a VXLAN header for the VNI of an encrypted overlay network which any running container on the node is connected to"
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "An unprivileged user on a Swarm node can trivially inject forged Ethernet frames into an encrypted overlay network on another node."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T16:42:20.998Z",
        "orgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e",
        "shortName": "Docker"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/moby/moby/security/advisories/GHSA-6m9p-4h64-m6vh"
        }
      ],
      "title": "Blind VXLAN injection into encrypted overlay networks from cluster peer",
      "workarounds": [
        {
          "lang": "en",
          "value": "Block userspace processes from sending UDP packets to the Swarm data-path port.\n\niptables -I OUTPUT -p udp --dport \"$(docker info --format \u0027{{.Swarm.Cluster.DataPathPort}}\u0027)\" -m owner --socket-exists -j DROP"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "686469e6-3ff6-451b-ab8b-cf5b9e89401e",
    "assignerShortName": "Docker",
    "cveId": "CVE-2026-92542",
    "datePublished": "2026-10-07T16:42:20.998Z",
    "dateReserved": "2026-09-16T13:00:30.172Z",
    "dateUpdated": "2026-10-07T20:30:49.884Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

UBUNTU-CVE-2026-92542 (CVE-2026-92542)

CVE-2026-92542 (GCVE-0-2026-92542)

Tags

Sightings

Nomenclature

Related by attack behaviour