{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.12-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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 \u0026init_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-\u003esk); 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 \u0026init_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-\u003esk)) 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 \u0026init_net outlier.",
  "id": "DEBIAN-CVE-2026-63914",
  "modified": "2026-09-14T16:47:32.087706904Z",
  "published": "2026-07-19T16:17:09.373Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-63914"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-63914"
  ]
}