CVE-2023-53016 (GCVE-0-2023-53016)
Vulnerability from cvelistv5
Published
2025-03-27 16:43
Modified
2025-05-04 07:47
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix possible deadlock in rfcomm_sk_state_change syzbot reports a possible deadlock in rfcomm_sk_state_change [1]. While rfcomm_sock_connect acquires the sk lock and waits for the rfcomm lock, rfcomm_sock_release could have the rfcomm lock and hit a deadlock for acquiring the sk lock. Here's a simplified flow: rfcomm_sock_connect: lock_sock(sk) rfcomm_dlc_open: rfcomm_lock() rfcomm_sock_release: rfcomm_sock_shutdown: rfcomm_lock() __rfcomm_dlc_close: rfcomm_k_state_change: lock_sock(sk) This patch drops the sk lock before calling rfcomm_dlc_open to avoid the possible deadlock and holds sk's reference count to prevent use-after-free after rfcomm_dlc_open completes.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17511bd84871f4a6106cb335616e086880313f3fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d80d57ffcb55488f0ec0b77928d4f82d16b6a90Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98aec50ff7f60cc6f2d6a4396b475c547e58b04dPatch
Impacted products
Vendor Product Version
Linux Linux Version: 1804fdf6e494e5e2938c65d8391690b59bcff897
Version: 1804fdf6e494e5e2938c65d8391690b59bcff897
Version: 1804fdf6e494e5e2938c65d8391690b59bcff897
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   Linux Linux Version: 5.15
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/rfcomm/sock.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Fix possible deadlock in rfcomm_sk_state_change\n\nsyzbot reports a possible deadlock in rfcomm_sk_state_change [1].\nWhile rfcomm_sock_connect acquires the sk lock and waits for\nthe rfcomm lock, rfcomm_sock_release could have the rfcomm\nlock and hit a deadlock for acquiring the sk lock.\nHere\u0027s a simplified flow:\n\nrfcomm_sock_connect:\n  lock_sock(sk)\n  rfcomm_dlc_open:\n    rfcomm_lock()\n\nrfcomm_sock_release:\n  rfcomm_sock_shutdown:\n    rfcomm_lock()\n    __rfcomm_dlc_close:\n        rfcomm_k_state_change:\n\t  lock_sock(sk)\n\nThis patch drops the sk lock before calling rfcomm_dlc_open to\navoid the possible deadlock and holds sk\u0027s reference count to\nprevent use-after-free after rfcomm_dlc_open completes."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:47:44.298Z",
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    "cveId": "CVE-2023-53016",
    "datePublished": "2025-03-27T16:43:44.528Z",
    "dateReserved": "2025-03-27T16:40:15.750Z",
    "dateUpdated": "2025-05-04T07:47:44.298Z",
    "state": "PUBLISHED"
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  }
}


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