ghsa-q9hj-m4q6-fcrh
Vulnerability from github
Published
2025-09-18 15:30
Modified
2025-09-18 15:30
Details

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

Bluetooth: L2CAP: Fix user-after-free

This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace:

Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50386"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-18T14:15:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix user-after-free\n\nThis uses l2cap_chan_hold_unless_zero() after calling\n__l2cap_get_chan_blah() to prevent the following trace:\n\nBluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref\n*kref)\nBluetooth: chan 0000000023c4974d\nBluetooth: parent 00000000ae861c08\n==================================================================\nBUG: KASAN: use-after-free in __mutex_waiter_is_first\nkernel/locking/mutex.c:191 [inline]\nBUG: KASAN: use-after-free in __mutex_lock_common\nkernel/locking/mutex.c:671 [inline]\nBUG: KASAN: use-after-free in __mutex_lock+0x278/0x400\nkernel/locking/mutex.c:729\nRead of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389",
  "id": "GHSA-q9hj-m4q6-fcrh",
  "modified": "2025-09-18T15:30:33Z",
  "published": "2025-09-18T15:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50386"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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