CVE-2022-50542 (GCVE-0-2022-50542)
Vulnerability from cvelistv5
Published
2025-10-07 15:21
Modified
2025-10-07 15:21
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
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/media/radio/si470x/radio-si470x-usb.c"
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          ],
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          "vendor": "Linux",
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-07T15:21:07.236Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891"
        },
        {
          "url": "https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7"
        },
        {
          "url": "https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6"
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        {
          "url": "https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a"
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          "url": "https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75"
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          "url": "https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5"
        }
      ],
      "title": "media: si470x: Fix use-after-free in si470x_int_in_callback()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50542",
    "datePublished": "2025-10-07T15:21:07.236Z",
    "dateReserved": "2025-10-07T15:15:38.667Z",
    "dateUpdated": "2025-10-07T15:21:07.236Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50542\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-07T16:15:38.557\",\"lastModified\":\"2025-10-08T19:38:32.610\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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