FKIE_CVE-2025-68781

Vulnerability from fkie_nvd - Published: 2026-01-13 16:15 - Updated: 2026-01-14 16:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions: 1. When a host controller binds to the OTG controller. 2. When the USB ID pin state changes (cable insertion/removal). A race condition occurs when the device is removed via fsl_otg_remove(): the fsl_otg instance may be freed while the delayed work is still pending or executing. This leads to use-after-free when the work function fsl_otg_event() accesses the already freed memory. The problematic scenario: (detach thread) | (delayed work) fsl_otg_remove() | kfree(fsl_otg_dev) //FREE| fsl_otg_event() | og = container_of(...) //USE | og-> //USE Fix this by calling disable_delayed_work_sync() in fsl_otg_remove() before deallocating the fsl_otg structure. This ensures the delayed work is properly canceled and completes execution prior to memory deallocation. This bug was identified through static analysis.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/319f7a85b3c4e34ac2fe083eb146fe129a556317
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4476c73bbbb09b13a962176fca934b32d3954a2e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: phy: fsl-usb: Fix use-after-free in delayed work during device removal\n\nThe delayed work item otg_event is initialized in fsl_otg_conf() and\nscheduled under two conditions:\n1. When a host controller binds to the OTG controller.\n2. When the USB ID pin state changes (cable insertion/removal).\n\nA race condition occurs when the device is removed via fsl_otg_remove():\nthe fsl_otg instance may be freed while the delayed work is still pending\nor executing. This leads to use-after-free when the work function\nfsl_otg_event() accesses the already freed memory.\n\nThe problematic scenario:\n\n(detach thread)            | (delayed work)\nfsl_otg_remove()           |\n  kfree(fsl_otg_dev) //FREE| fsl_otg_event()\n                           |   og = container_of(...) //USE\n                           |   og-\u003e //USE\n\nFix this by calling disable_delayed_work_sync() in fsl_otg_remove()\nbefore deallocating the fsl_otg structure. This ensures the delayed work\nis properly canceled and completes execution prior to memory deallocation.\n\nThis bug was identified through static analysis."
    }
  ],
  "id": "CVE-2025-68781",
  "lastModified": "2026-01-14T16:26:00.933",
  "metrics": {},
  "published": "2026-01-13T16:15:57.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/319f7a85b3c4e34ac2fe083eb146fe129a556317"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4476c73bbbb09b13a962176fca934b32d3954a2e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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