net: qrtr: restrict socket creation to the initial network namespace

{
  "id": "b09c613a1a5b4296f2b091bae2ac29088fa28b3ac9460b2cf893cac1950c2e47",
  "url": "https://osv.dev/vulnerability/CVE-2026-68294",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: qrtr: restrict socket creation to the initial network namespace",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: qrtr: restrict socket creation to the initial network namespace QRTR keeps its entire port and node state in module-global variables that are not partitioned per network namespace: qrtr_local_nid is a single global node id (always 1) and qrtr_ports is a single global xarray. qrtr_port_lookup() and qrtr_local_enqueue() operate on that global state with no network-namespace check, and qrtr_create() places no restriction on the namespace a socket is created in. As a result an unprivileged process that creates an AF_QIPCRTR socket in a separate network namespace, e.g. via unshare(CLONE_NEWUSER | CLONE_NEWNET), can send QRTR datagrams - including control-plane messages such as QRTR_TYPE_NEW_SERVER - to QRTR sockets owned by another namespace, and vice versa. The receiving socket sees such a message as coming from node id 1, indistinguishable from a legitimate local client, breaking the isolation that network namespaces are expected to provide. QRTR is a transport to global hardware endpoints (the modem and other remote processors) and has no per-namespace semantics; its in-kernel name service already creates its socket in init_net only. Confine the socket family to the initial network namespace, as other non-namespace-aware socket families do (see llc_ui_create() and the ieee802154 socket code).",
    "evidence": "osv:CVE-2026-68294",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.265",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.216",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.183",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.148",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-68294",
      "aliases": [
        "CVE-2026-68294"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "7814f6a3415cad38aa8d6dfc573df778260d66aa"
                },
                {
                  "fixed": "2d22b94a154ccb9755dddfff802fe3e2b1adbab5"
                },
                {
                  "fixed": "8d351fe0654a20c9f95a61b05d24ebe6d4be3fbb"
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                {
                  "fixed": "4b95e1f0d6e6342c427cb341ee18a894b146b789"
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                  "fixed": "f488116df769bdaf89c93371350e49e12133e70f"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68294.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.7.0"
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                {
                  "fixed": "5.10.265"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68294.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.617456959Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2d22b94a154ccb9755dddfff802fe3e2b1adbab5",
        "https://git.kernel.org/stable/c/3b536db8fb32da9e9c62f2bb45e2e319331f0426",
        "https://git.kernel.org/stable/c/4b95e1f0d6e6342c427cb341ee18a894b146b789",
        "https://git.kernel.org/stable/c/659b9b4f194bb56b9903cc95e786ef1d438baa7d",
        "https://git.kernel.org/stable/c/7814f6a3415cad38aa8d6dfc573df778260d66aa",
        "https://git.kernel.org/stable/c/8150c48fb978e01689f94ed80148f8a7499ae571",
        "https://git.kernel.org/stable/c/8d351fe0654a20c9f95a61b05d24ebe6d4be3fbb",
        "https://git.kernel.org/stable/c/f488116df769bdaf89c93371350e49e12133e70f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68294.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-68294",
        "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/2026/68xxx/CVE-2026-68294.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-68294",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497765,
  "published_at": "2026-08-10T12:02:27.423+00:00"
}