Bluetooth: ISO: drop ISO_END frames received without prior ISO_START

{
  "id": "bec6661f751ba1282b6dfd71da897c893e70d4ab95616a9db73fbf09a7cbf8fa",
  "url": "https://osv.dev/vulnerability/CVE-2026-64128",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: ISO: drop ISO_END frames received without prior ISO_START",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: drop ISO_END frames received without prior ISO_START ISO data PDUs carry a packet-boundary flag indicating START, CONT, END or SINGLE. The ISO_CONT branch of iso_recv() guards against a missing ISO_START by checking conn->rx_len before touching conn->rx_skb, but ISO_END does not. If a peer sends an ISO_END as the first packet on a fresh ISO connection, conn->rx_skb is still NULL and conn->rx_len is zero, so skb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS, where receivers sync to a broadcaster without pairing, any broadcaster on the air can trigger this. Mirror the ISO_CONT check at the top of ISO_END so a stray end fragment is logged and dropped instead of crashing the host.",
    "evidence": "osv:CVE-2026-64128",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.175",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.142",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.92",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.34",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.11",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-64128",
      "aliases": [
        "CVE-2026-64128"
      ],
      "affected": [
        {
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                  "fixed": "3af41ee7ebecb0d5c8a504861f6cfad31345310f"
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                  "fixed": "39f4a82e80c8f5ed2d6952d73fbafc895721a728"
                },
                {
                  "fixed": "61f2410a96dee808029e2ae4d6ef2dd635f3477f"
                },
                {
                  "fixed": "e3a799881c12d27596232636a607e2e3fa448d63"
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                {
                  "fixed": "84c24fb151fc1179355296d7ff29129ac7c42129"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64128.json"
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        {
          "ranges": [
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              "type": "ECOSYSTEM",
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64128.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.121399665Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b",
        "https://git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728",
        "https://git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f",
        "https://git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f",
        "https://git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129",
        "https://git.kernel.org/stable/c/e3a799881c12d27596232636a607e2e3fa448d63",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64128.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64128",
        "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/2026/64xxx/CVE-2026-64128.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64128",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518215,
  "published_at": "2026-07-19T15:40:24.678+00:00"
}