ghsa-58q4-73m8-4p8p
Vulnerability from github
Published
2025-12-30 15:30
Modified
2025-12-30 15:30
Details

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()

KASAN reports that there's a use-after-free in hci_remove_adv_monitor(). Trawling through the disassembly, you can see that the complaint is from the access in bt_dev_dbg() under the HCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because msft_remove_monitor() can end up freeing the monitor structure. Specifically: hci_remove_adv_monitor() -> msft_remove_monitor() -> msft_remove_monitor_sync() -> msft_le_cancel_monitor_advertisement_cb() -> hci_free_adv_monitor()

Let's fix the problem by just stashing the relevant data when it's still valid.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54210"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:16:09Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()\n\nKASAN reports that there\u0027s a use-after-free in\nhci_remove_adv_monitor(). Trawling through the disassembly, you can\nsee that the complaint is from the access in bt_dev_dbg() under the\nHCI_ADV_MONITOR_EXT_MSFT case. The problem case happens because\nmsft_remove_monitor() can end up freeing the monitor\nstructure. Specifically:\n  hci_remove_adv_monitor() -\u003e\n  msft_remove_monitor() -\u003e\n  msft_remove_monitor_sync() -\u003e\n  msft_le_cancel_monitor_advertisement_cb() -\u003e\n  hci_free_adv_monitor()\n\nLet\u0027s fix the problem by just stashing the relevant data when it\u0027s\nstill valid.",
  "id": "GHSA-58q4-73m8-4p8p",
  "modified": "2025-12-30T15:30:31Z",
  "published": "2025-12-30T15:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54210"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d4d6b083da9b033ddccef72d77f373c819ae3ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf00c2c8f6254f44ac041aa9a311ae9e0caf692b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de6dfcefd107667ce2dbedf4d9337f5ed557a4a1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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