fkie_cve-2022-50542
Vulnerability from fkie_nvd
Published
2025-10-07 16:15
Modified
2025-10-08 19:38
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: si470x: Fix use-after-free in si470x_int_in_callback() syzbot reported use-after-free in si470x_int_in_callback() [1]. This indicates that urb->context, which contains struct si470x_device object, is freed when si470x_int_in_callback() is called. The cause of this issue is that si470x_int_in_callback() is called for freed urb. si470x_usb_driver_probe() calls si470x_start_usb(), which then calls usb_submit_urb() and si470x_start(). If si470x_start_usb() fails, si470x_usb_driver_probe() doesn't kill urb, but it just frees struct si470x_device object, as depicted below: si470x_usb_driver_probe() ... si470x_start_usb() ... usb_submit_urb() retval = si470x_start() return retval if (retval < 0) free struct si470x_device object, but don't kill urb This patch fixes this issue by killing urb when si470x_start_usb() fails and urb is submitted. If si470x_start_usb() fails and urb is not submitted, i.e. submitting usb fails, it just frees struct si470x_device object.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: si470x: Fix use-after-free in si470x_int_in_callback()\n\nsyzbot reported use-after-free in si470x_int_in_callback() [1].  This\nindicates that urb-\u003econtext, which contains struct si470x_device\nobject, is freed when si470x_int_in_callback() is called.\n\nThe cause of this issue is that si470x_int_in_callback() is called for\nfreed urb.\n\nsi470x_usb_driver_probe() calls si470x_start_usb(), which then calls\nusb_submit_urb() and si470x_start().  If si470x_start_usb() fails,\nsi470x_usb_driver_probe() doesn\u0027t kill urb, but it just frees struct\nsi470x_device object, as depicted below:\n\nsi470x_usb_driver_probe()\n  ...\n  si470x_start_usb()\n    ...\n    usb_submit_urb()\n    retval = si470x_start()\n    return retval\n  if (retval \u003c 0)\n    free struct si470x_device object, but don\u0027t kill urb\n\nThis patch fixes this issue by killing urb when si470x_start_usb()\nfails and urb is submitted.  If si470x_start_usb() fails and urb is\nnot submitted, i.e. submitting usb fails, it just frees struct\nsi470x_device object."
    }
  ],
  "id": "CVE-2022-50542",
  "lastModified": "2025-10-08T19:38:32.610",
  "metrics": {},
  "published": "2025-10-07T16:15:38.557",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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