CVE-2026-90252 (GCVE-0-2026-90252)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:07 – Updated: 2026-09-17 16:07
VLAI
Title
Bluetooth: MGMT: free the HCI command when it is cancelled
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: free the HCI command when it is cancelled mgmt_hci_cmd_sync() queues the pending command with a NULL destroy callback, so it is only freed if send_hci_cmd_sync() runs. A cancelled entry is leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when there is no destroy callback, and hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. Nothing else reclaims it either: mgmt_pending_new() does not put the command on hdev->mgmt_pending. The leak also pins the socket reference taken by mgmt_pending_new(), so the mgmt socket is never released. Free the command from a destroy callback. The now-empty done label is replaced by a direct return.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 827af4787e74e8df9e8e0677a69fbb15e0856d2f , < e0cd7b34dc6b5414cac3d4cd376f73d3e9ffbd93 (git)
Affected: 827af4787e74e8df9e8e0677a69fbb15e0856d2f , < 481533b03985177ddc805e0bd12fc07e7adf9040 (git)
Affected: 827af4787e74e8df9e8e0677a69fbb15e0856d2f , < 414b365ecea6c30357adee6b8a7c5edc03a03575 (git)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: free the HCI command when it is cancelled\n\nmgmt_hci_cmd_sync() queues the pending command with a NULL destroy\ncallback, so it is only freed if send_hci_cmd_sync() runs. A cancelled\nentry is leaked, as _hci_cmd_sync_cancel_entry() does not release\nentry-\u003edata when there is no destroy callback, and hci_cmd_sync_clear()\ncancels every pending entry when the controller is unregistered. Nothing\nelse reclaims it either: mgmt_pending_new() does not put the command on\nhdev-\u003emgmt_pending.\n\nThe leak also pins the socket reference taken by mgmt_pending_new(), so\nthe mgmt socket is never released.\n\nFree the command from a destroy callback. The now-empty done label is\nreplaced by a direct return."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:07:52.738Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/414b365ecea6c30357adee6b8a7c5edc03a03575"
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      ],
      "title": "Bluetooth: MGMT: free the HCI command when it is cancelled",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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    "datePublished": "2026-09-17T16:07:52.738Z",
    "dateReserved": "2026-09-11T19:38:34.795Z",
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: free the HCI command when it is cancelled\n\nmgmt_hci_cmd_sync() queues the pending command with a NULL destroy\ncallback, so it is only freed if send_hci_cmd_sync() runs. A cancelled\nentry is leaked, as _hci_cmd_sync_cancel_entry() does not release\nentry-\u003edata when there is no destroy callback, and hci_cmd_sync_clear()\ncancels every pending entry when the controller is unregistered. Nothing\nelse reclaims it either: mgmt_pending_new() does not put the command on\nhdev-\u003emgmt_pending.\n\nThe leak also pins the socket reference taken by mgmt_pending_new(), so\nthe mgmt socket is never released.\n\nFree the command from a destroy callback. The now-empty done label is\nreplaced by a direct return."
          }
        ],
        "id": "CVE-2026-90252",
        "lastModified": "2026-09-17T17:17:21.500",
        "metrics": {},
        "published": "2026-09-17T17:17:21.500",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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