CVE-2026-97419 (GCVE-0-2026-97419)
Vulnerability from cvelistv5
Published
2026-09-24 16:03
Modified
2026-10-03 10:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: hsr: broadcast netlink notifications in the device's net namespace The HSR generic netlink family sets .netnsok = true. HSR devices can live in network namespaces other than init_net. Two async notifiers broadcast events with genlmsg_multicast(). They are hsr_nl_ringerror() and hsr_nl_nodedown(). That helper delivers only on the default genl socket in init_net. So the events always land in init_net. The network namespace of the device does not matter. This has two effects. A listener in the device's own namespace never sees its own ring error and node down events. A privileged listener in init_net receives events from HSR devices in other namespaces. The payload carries the peer node MAC (HSR_A_NODE_ADDR) and the slave port ifindex (HSR_A_IFINDEX). Switch both callers to genlmsg_multicast_netns(). Other families with .netnsok = true already do this. Examples are gtp, ovpn, team, batman-adv, netdev-genl, ethtool and handshake. hsr_nl_ringerror() already has the slave port. It uses dev_net(port->dev). hsr_nl_nodedown() takes the namespace from the master port via hsr_port_get_hsr().
References
Impacted products
Vendor Product Version
Linux Linux Version: f421436a591d34fa5279b54a96ac07d70250cc8d
Version: f421436a591d34fa5279b54a96ac07d70250cc8d
Version: f421436a591d34fa5279b54a96ac07d70250cc8d
Version: f421436a591d34fa5279b54a96ac07d70250cc8d
Version: f421436a591d34fa5279b54a96ac07d70250cc8d
Version: f421436a591d34fa5279b54a96ac07d70250cc8d
Version: f421436a591d34fa5279b54a96ac07d70250cc8d
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/hsr/hsr_netlink.c"
          ],
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
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            },
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhsr: broadcast netlink notifications in the device\u0027s net namespace\n\nThe HSR generic netlink family sets .netnsok = true. HSR devices can\nlive in network namespaces other than init_net.\n\nTwo async notifiers broadcast events with genlmsg_multicast(). They\nare hsr_nl_ringerror() and hsr_nl_nodedown(). That helper delivers\nonly on the default genl socket in init_net. So the events always land\nin init_net. The network namespace of the device does not matter.\n\nThis has two effects. A listener in the device\u0027s own namespace never\nsees its own ring error and node down events. A privileged listener in\ninit_net receives events from HSR devices in other namespaces. The\npayload carries the peer node MAC (HSR_A_NODE_ADDR) and the slave port\nifindex (HSR_A_IFINDEX).\n\nSwitch both callers to genlmsg_multicast_netns(). Other families with\n.netnsok = true already do this. Examples are gtp, ovpn, team,\nbatman-adv, netdev-genl, ethtool and handshake.\n\nhsr_nl_ringerror() already has the slave port. It uses\ndev_net(port-\u003edev). hsr_nl_nodedown() takes the namespace from the\nmaster port via hsr_port_get_hsr()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:11.119Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9f13023607f1e95bd098cc49052b0c8955d334f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/798ccb12810a58a37264685b28ddf990ef49559c"
        },
        {
          "url": "https://git.kernel.org/stable/c/9bf45feee630be868ab54e3d0f3d430c07471f0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/016b8eaca53bfd57e84ea28b5c9174c89d7679e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/25b69f281cebe051a8e4ab19950a939c27ead1bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/24b3f1a9982c176d05a523a4bb9314dca0db4488"
        },
        {
          "url": "https://git.kernel.org/stable/c/a762fabd7ef9a6cc07258684138f9c3f078d0326"
        }
      ],
      "title": "hsr: broadcast netlink notifications in the device\u0027s net namespace",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97419",
    "datePublished": "2026-09-24T16:03:28.957Z",
    "dateReserved": "2026-09-24T14:53:16.868Z",
    "dateUpdated": "2026-10-03T10:58:11.119Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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