CVE-2026-43018 (GCVE-0-2026-43018)
Vulnerability from cvelistv5
Published
2026-05-01 14:15
Modified
2026-05-03 05:46
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt hci_conn lookup and field access must be covered by hdev lock in hci_le_remote_conn_param_req_evt, otherwise it's possible it is freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage.
References
Impacted products
Vendor Product Version
Linux Linux Version: 95118dd4edfec950898a00180c6f998df0a6406d
Version: 95118dd4edfec950898a00180c6f998df0a6406d
Version: 95118dd4edfec950898a00180c6f998df0a6406d
Version: 95118dd4edfec950898a00180c6f998df0a6406d
Version: 95118dd4edfec950898a00180c6f998df0a6406d
Version: 95118dd4edfec950898a00180c6f998df0a6406d
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{
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      "cpeApplicability": [
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          "nodes": [
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_le_remote_conn_param_req_evt, otherwise it\u0027s possible it is freed\nconcurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage."
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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        "dateUpdated": "2026-05-03T05:46:05.696Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20"
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          "url": "https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81"
        },
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09"
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      ],
      "title": "Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43018",
    "datePublished": "2026-05-01T14:15:22.308Z",
    "dateReserved": "2026-05-01T14:12:55.975Z",
    "dateUpdated": "2026-05-03T05:46:05.696Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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