{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4"
            },
            {
              "fixed": "bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad"
            },
            {
              "fixed": "6df8157547347b5257bf640a0ae3dfc4411e06cd"
            },
            {
              "fixed": "fe463798343382c8fe9416a95959f005a3c30aa5"
            },
            {
              "fixed": "00f2c451e57df50b1151d9b2254878f106b7c892"
            },
            {
              "fixed": "a306cf2ac8849c487791369fad6f216399d000f6"
            },
            {
              "fixed": "448bb92ca101dde8a6e88b4dc824044b4e341604"
            },
            {
              "fixed": "26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126"
            },
            {
              "fixed": "7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.21"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63914.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: route MIGRATE notifications to caller's netns\n\nxfrm_send_migrate() in net/xfrm/xfrm_user.c and pfkey_send_migrate()\nin net/key/af_key.c both hardcode \u0026init_net for the multicast that\nannounces a successful XFRM_MSG_MIGRATE / SADB_X_MIGRATE.\n\nXFRM_MSG_MIGRATE arrives on a per-netns NETLINK_XFRM socket, and the\nrest of the xfrm/af_key netlink path was made netns-aware in 2008.\nThe other 14 multicast paths in xfrm_user.c route their event using\nxs_net(x), xp_net(xp) or sock_net(skb-\u003esk); only the migrate path\nwas missed.\n\nTwo consequences of the init_net hardcoding:\n\n  1. The notification (selector, old/new endpoint addresses, and the\n     km_address) is delivered to listeners on init_net's\n     XFRMNLGRP_MIGRATE / pfkey BROADCAST_ALL groups rather than on\n     the issuing netns. An IKE daemon running in init_net therefore\n     receives migration notifications originating from any other\n     netns on the host.\n\n  2. An IKE daemon running inside a non-init netns and subscribed\n     to its own XFRMNLGRP_MIGRATE / pfkey groups never receives the\n     notification of its own migration. IKEv2 MOBIKE / address-update\n     handling inside a netns is silently broken.\n\nThread struct net through km_migrate() and the xfrm_mgr.migrate\nfunction pointer, drop the \u0026init_net override in xfrm_send_migrate()\nand pfkey_send_migrate(), and pass the caller's net (already in\nscope in xfrm_migrate() via sock_net(skb-\u003esk)) all the way down.\nstruct xfrm_mgr is in-tree only and not exported as a stable API,\nso the function-pointer signature change is internal.\n\npfkey_broadcast() is already netns-aware via net_generic(net,\npfkey_net_id) since the pernet conversion. The five other\npfkey_broadcast() callers in af_key.c already pass xs_net(x),\nsock_net(sk) or a per-netns net, so this only removes the\n\u0026init_net outlier.",
  "id": "CVE-2026-63914",
  "modified": "2026-07-22T05:30:06.409582353Z",
  "published": "2026-07-19T14:55:18.618Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63914.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63914"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "xfrm: route MIGRATE notifications to caller's netns"
}