CVE-2025-40318 (GCVE-0-2025-40318)
Vulnerability from cvelistv5
Published
2025-12-08 00:46
Modified
2025-12-08 00:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once hci_cmd_sync_dequeue_once() does lookup and then cancel the entry under two separate lock sections. Meanwhile, hci_cmd_sync_work() can also delete the same entry, leading to double list_del() and "UAF". Fix this by holding cmd_sync_work_lock across both lookup and cancel, so that the entry cannot be removed concurrently.
References
Impacted products
Vendor Product Version
Linux Linux Version: f00f36db76eb8fd10d13e80e2590f23b5beaa54d
Version: 1499f79995c7ee58e3bfeeff75f6d1b37dcda881
Version: 505ea2b295929e7be2b4e1bc86ee31cb7862fb01
Version: 505ea2b295929e7be2b4e1bc86ee31cb7862fb01
Version: 505ea2b295929e7be2b4e1bc86ee31cb7862fb01
Version: 357603f4d396d85fbf0045512efaf1d7f7394ed7
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_sync.c"
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once\n\nhci_cmd_sync_dequeue_once() does lookup and then cancel\nthe entry under two separate lock sections. Meanwhile,\nhci_cmd_sync_work() can also delete the same entry,\nleading to double list_del() and \"UAF\".\n\nFix this by holding cmd_sync_work_lock across both\nlookup and cancel, so that the entry cannot be removed\nconcurrently."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:45.382Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/09b0cd1297b4dbfe736aeaa0ceeab2265f47f772"
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      ],
      "title": "Bluetooth: hci_sync: fix race in hci_cmd_sync_dequeue_once",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40318",
    "datePublished": "2025-12-08T00:46:45.382Z",
    "dateReserved": "2025-04-16T07:20:57.186Z",
    "dateUpdated": "2025-12-08T00:46:45.382Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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