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1 vulnerability found for Moby overlay network driver by Moby

CVE-2026-92542 (GCVE-0-2026-92542)
Vulnerability from cvelistv5
Published
2026-10-07 16:42
Modified
2026-10-07 20:30
Summary
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
Impacted products
Vendor Product Version
Docker Docker Engine Version: 0   ≤
Version: 26.0.0   ≤
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Show details on NVD website


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              "content": {
                "id": "CVE-2026-92542",
                "options": [
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                  {
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-07T20:30:27.853237Z",
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        "problemTypes": [
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            "descriptions": [
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                "cweId": "CWE-290",
                "description": "CWE-290 Authentication Bypass by Spoofing",
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                "type": "CWE"
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        "title": "CISA ADP Vulnrichment"
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          "platforms": [
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          "vendor": "Docker",
          "versions": [
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              "lessThan": "25.0.19",
              "status": "affected",
              "version": "0",
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            {
              "lessThan": "29.8.2",
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              "version": "26.0.0",
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          "packageName": "github.com/docker/docker/libnetwork/drivers/overlay",
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        {
          "defaultStatus": "unaffected",
          "packageName": "github.com/moby/moby/v2/daemon/libnetwork/drivers/overlay",
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          "product": "Moby overlay network driver",
          "vendor": "Moby",
          "versions": [
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      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Linux Swarm nodes participating in an encrypted overlay network"
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      ],
      "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."
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          ]
        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
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            "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",
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      "references": [
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          "url": "https://github.com/moby/moby/security/advisories/GHSA-6m9p-4h64-m6vh"
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      ],
      "title": "Blind VXLAN injection into encrypted overlay networks from cluster peer",
      "workarounds": [
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          "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"
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