FKIE_CVE-2026-63914

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-20 15:16
Severity
7.3 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L
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 not exported as a stable API, so the function-pointer signature change is internal. pfkey_broadcast() is already netns-aware via net_generic(net, pfkey_net_id) since the pernet conversion. The five other pfkey_broadcast() callers in af_key.c already pass xs_net(x), sock_net(sk) or a per-netns net, so this only removes the &init_net outlier.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/xfrm.h",
            "net/key/af_key.c",
            "net/xfrm/xfrm_policy.c",
            "net/xfrm/xfrm_state.c",
            "net/xfrm/xfrm_user.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "6df8157547347b5257bf640a0ae3dfc4411e06cd",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "fe463798343382c8fe9416a95959f005a3c30aa5",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "00f2c451e57df50b1151d9b2254878f106b7c892",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "a306cf2ac8849c487791369fad6f216399d000f6",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "448bb92ca101dde8a6e88b4dc824044b4e341604",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            },
            {
              "lessThan": "7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4",
              "status": "affected",
              "version": "5c79de6e79cd8ecfbae28886be3ee49044f3a4d4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/xfrm.h",
            "net/key/af_key.c",
            "net/xfrm/xfrm_policy.c",
            "net/xfrm/xfrm_state.c",
            "net/xfrm/xfrm_user.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.21"
            },
            {
              "lessThan": "2.6.21",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.93",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: route MIGRATE notifications to caller\u0027s 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\u0027s\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\u0027s 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",
  "lastModified": "2026-07-20T15:16:55.553",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 4.7,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-19T16:17:09.373",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/00f2c451e57df50b1151d9b2254878f106b7c892"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26ce8dbf2e23fe4fcc3351d19ef6d3fb703ed126"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/448bb92ca101dde8a6e88b4dc824044b4e341604"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6df8157547347b5257bf640a0ae3dfc4411e06cd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7e2a4f7ca0952820731ef7bdadfc9a9e9d3571b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a306cf2ac8849c487791369fad6f216399d000f6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bafc7d0774b9bf52909c70ed990bc5ccf7ec4bad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe463798343382c8fe9416a95959f005a3c30aa5"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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