xfrm: route MIGRATE notifications to caller's netns

{
  "id": "ade0a1b2e2b5643c5fb47bd0132f4a1d9232dccc1ddce5b894f92ec495f87cdb",
  "url": "https://osv.dev/vulnerability/CVE-2026-63914",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xfrm: route MIGRATE notifications to caller's netns",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: xfrm: route MIGRATE notifications to caller's netns xfrm_send_migrate() in net/xfrm/xfrm_user.c and pfkey_send_migrate() in net/key/af_key.c both hardcode &init_net for the multicast that announces a successful XFRM_MSG_MIGRATE / SADB_X_MIGRATE. XFRM_MSG_MIGRATE arrives on a per-netns NETLINK_XFRM socket, and the rest of the xfrm/af_key netlink path was made netns-aware in 2008. The other 14 multicast paths in xfrm_user.c route their event using xs_net(x), xp_net(xp) or sock_net(skb->sk); only the migrate path was missed. Two consequences of the init_net hardcoding: 1. The notification (selector, old/new endpoint addresses, and the km_address) is delivered to listeners on init_net's XFRMNLGRP_MIGRATE / pfkey BROADCAST_ALL groups rather than on the issuing netns. An IKE daemon running in init_net therefore receives migration notifications originating from any other netns on the host. 2. An IKE daemon running inside a non-init netns and subscribed to its own XFRMNLGRP_MIGRATE / pfkey groups never receives the notification of its own migration. IKEv2 MOBIKE / address-update handling inside a netns is silently broken. Thread struct net through km_migrate() and the xfrm_mgr.migrate function pointer, drop the &init_net override in xfrm_send_migrate() and pfkey_send_migrate(), and pass the caller's net (already in scope in xfrm_migrate() via sock_net(skb->sk)) all the way down. struct xfrm_mgr is in-tree only and no",
    "evidence": "osv:CVE-2026-63914",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.259",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.210",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.176",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.143",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.93",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.35",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-63914",
      "aliases": [
        "CVE-2026-63914"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad"
                },
                {
                  "fixed": "6df8157547347b5257bf640a0ae3dfc4411e06cd"
                },
                {
                  "fixed": "fe463798343382c8fe9416a95959f005a3c30aa5"
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                {
                  "fixed": "00f2c451e57df50b1151d9b2254878f106b7c892"
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                {
                  "fixed": "a306cf2ac8849c487791369fad6f216399d000f6"
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                {
                  "fixed": "448bb92ca101dde8a6e88b4dc824044b4e341604"
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                {
                  "fixed": "26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126"
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                {
                  "fixed": "7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63914.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.21"
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                {
                  "fixed": "5.10.259"
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              ]
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "5.11.0"
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              "type": "ECOSYSTEM",
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                  "introduced": "6.7.0"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.35"
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
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                {
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63914.json"
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        }
      ],
      "modified": "2026-11-01T02:30:27.367455982Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892",
        "https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126",
        "https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604",
        "https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd",
        "https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4",
        "https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6",
        "https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad",
        "https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63914.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63914",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63914.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-63914",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 488321,
  "published_at": "2026-07-19T14:55:18.618+00:00"
}