media: si470x: Fix use-after-free in si470x_int_in_callback()

{
  "id": "7a438fa4388b0fa191e25c02de3e29d4fff1271d1a6c42427d00e7fe9250ab40",
  "url": "https://osv.dev/vulnerability/CVE-2022-50542",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: si470x: Fix use-after-free in si470x_int_in_callback()",
    "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.",
    "evidence": "osv:CVE-2022-50542",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.9.337",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "4.14.303",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "4.19.270",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.229",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.163",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.86",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50542",
      "aliases": [
        "CVE-2022-50542"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "146bd005ebb01ae190c22af050cb98623958c373"
                },
                {
                  "fixed": "8c6151b8e8dd2d98ad2cd725d26d1e103d989891"
                },
                {
                  "fixed": "52f54fe78cca24850a30865037250f63eb3d5bf7"
                },
                {
                  "fixed": "0ca298d548461d29615f9a2b1309e8dcf4a352c6"
                },
                {
                  "fixed": "1c6447d0fc68650e51586dde79b5090d9d77f13a"
                },
                {
                  "fixed": "6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75"
                },
                {
                  "fixed": "63648a7bd1a7599bcc2040a6d1792363ae4c2e1b"
                },
                {
                  "fixed": "92b0888398e4ba51d93b618a6506781f4e3879c9"
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                {
                  "fixed": "7d21e0b1b41b21d628bf2afce777727bd4479aa5"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50542.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.6.0"
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                {
                  "fixed": "4.9.337"
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              ]
            },
            {
              "type": "ECOSYSTEM",
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                  "introduced": "4.10.0"
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                  "introduced": "4.20.0"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50542.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.059670459Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6",
        "https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373",
        "https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a",
        "https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7",
        "https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b",
        "https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75",
        "https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5",
        "https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891",
        "https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50542.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50542",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50542.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50542",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517284,
  "published_at": "2025-10-07T15:21:07.236+00:00"
}