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 (&d->lock){+.+.}-{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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