ghsa-qjvc-xmqv-cwr9
Vulnerability from github
Published
2024-10-21 21:30
Modified
2024-11-08 18:30
Severity ?
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Details

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

Bluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change

rfcomm_sk_state_change attempts to use sock_lock so it must never be called with it locked but rfcomm_sock_ioctl always attempt to lock it causing the following trace:

====================================================== WARNING: possible circular locking dependency detected 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted

syz-executor386/5093 is trying to acquire lock: ffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline] ffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x5b/0x310 net/bluetooth/rfcomm/sock.c:73

but task is already holding lock: ffff88807badfd28 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x226/0x6a0 net/bluetooth/rfcomm/core.c:491

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50044"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:17Z",
    "severity": "LOW"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: RFCOMM: FIX possible deadlock in rfcomm_sk_state_change\n\nrfcomm_sk_state_change attempts to use sock_lock so it must never be\ncalled with it locked but rfcomm_sock_ioctl always attempt to lock it\ncausing the following trace:\n\n======================================================\nWARNING: possible circular locking dependency detected\n6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted\n------------------------------------------------------\nsyz-executor386/5093 is trying to acquire lock:\nffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1671 [inline]\nffff88807c396258 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x5b/0x310 net/bluetooth/rfcomm/sock.c:73\n\nbut task is already holding lock:\nffff88807badfd28 (\u0026d-\u003elock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x226/0x6a0 net/bluetooth/rfcomm/core.c:491",
  "id": "GHSA-qjvc-xmqv-cwr9",
  "modified": "2024-11-08T18:30:46Z",
  "published": "2024-10-21T21:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50044"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08d1914293dae38350b8088980e59fbc699a72fe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38b2d5a57d125e1c17661b8308c0240c4a43b534"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/496b2ab0fd10f205e08909a125485fdc98843dbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cb9807c9b53bf1e5560420d26f319f528b50268"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/869c6ee62ab8f01bf2419e45326642be5c9b670a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b77b3fb12fd483cae7c28648903b1d8a6b275f01"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ced98072d3511b232ae1d3347945f35f30c0e303"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef44274dae9b0a90d1a97ce8b242a3b8243a7745"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}


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