ghsa-5w6m-vxmj-7w4c
Vulnerability from github
Published
2025-12-07 00:30
Modified
2025-12-07 00:30
Details

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

Bluetooth: MGMT: cancel mesh send timer when hdev removed

mesh_send_done timer is not canceled when hdev is removed, which causes crash if the timer triggers after hdev is gone.

Cancel the timer when MGMT removes the hdev, like other MGMT timers.

Should fix the BUG: sporadically seen by BlueZ test bot (in "Mesh - Send cancel - 1" test).

Log:

BUG: KASAN: slab-use-after-free in run_timer_softirq+0x76b/0x7d0 ... Freed by task 36: kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_save_free_info+0x3a/0x60 __kasan_slab_free+0x43/0x70 kfree+0x103/0x500 device_release+0x9a/0x210 kobject_put+0x100/0x1e0 vhci_release+0x18b/0x240

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40284"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-06T22:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: cancel mesh send timer when hdev removed\n\nmesh_send_done timer is not canceled when hdev is removed, which causes\ncrash if the timer triggers after hdev is gone.\n\nCancel the timer when MGMT removes the hdev, like other MGMT timers.\n\nShould fix the BUG: sporadically seen by BlueZ test bot\n(in \"Mesh - Send cancel - 1\" test).\n\nLog:\n------\nBUG: KASAN: slab-use-after-free in run_timer_softirq+0x76b/0x7d0\n...\nFreed by task 36:\n kasan_save_stack+0x24/0x50\n kasan_save_track+0x14/0x30\n __kasan_save_free_info+0x3a/0x60\n __kasan_slab_free+0x43/0x70\n kfree+0x103/0x500\n device_release+0x9a/0x210\n kobject_put+0x100/0x1e0\n vhci_release+0x18b/0x240\n------",
  "id": "GHSA-5w6m-vxmj-7w4c",
  "modified": "2025-12-07T00:30:56Z",
  "published": "2025-12-07T00:30:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40284"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2927ff643607eddf4f03d10ef80fe10d977154aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55fb52ffdd62850d667ebed842815e072d3c9961"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b6b6c077cad0601d62c3c34ab7ce3fb25deda7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/990e6143b0ca0c66f099d67d00c112bf59b30d76"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd62ca5ad136dcf6f5aa308423b299a6be6f54ea"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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