Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating

{
  "id": "b9ba837eae4f3a4f47c04fe97918cb57723538c4bf66b68aded80f599a82fa85",
  "url": "https://osv.dev/vulnerability/CVE-2024-56654",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is not safe since for the most part entries fetched this way shall be treated as rcu_dereference: Note that the value returned by rcu_dereference() is valid only within the enclosing RCU read-side critical section [1]_. For example, the following is **not** legal:: rcu_read_lock(); p = rcu_dereference(head.next); rcu_read_unlock(); x = p->address; /* BUG!!! */ rcu_read_lock(); y = p->data; /* BUG!!! */ rcu_read_unlock();",
    "evidence": "osv:CVE-2024-56654",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.67",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-56654",
      "aliases": [
        "CVE-2024-56654"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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                  "introduced": "6.4.16"
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        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.6.0"
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                {
                  "fixed": "6.6.67"
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              ]
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            {
              "type": "ECOSYSTEM",
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:25.981082949Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911b",
        "https://git.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93ae",
        "https://git.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56654.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-56654",
        "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/2024/56xxx/CVE-2024-56654.json"
      }
    },
    "related_cves": [
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        "value": "CVE-2024-56654",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 492257,
  "published_at": "2024-12-27T15:06:18.224+00:00"
}