CVE-2022-50568 (GCVE-0-2022-50568)
Vulnerability from cvelistv5
Published
2025-10-22 13:23
Modified
2025-10-22 13:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.
References
Impacted products
Vendor Product Version
Linux Linux Version: 71adf118946957839a13aa4d1094183e05c6c094
Version: 71adf118946957839a13aa4d1094183e05c6c094
Version: 71adf118946957839a13aa4d1094183e05c6c094
Version: 71adf118946957839a13aa4d1094183e05c6c094
Version: 71adf118946957839a13aa4d1094183e05c6c094
Version: 71adf118946957839a13aa4d1094183e05c6c094
Version: 71adf118946957839a13aa4d1094183e05c6c094
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_hid.c"
          ],
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "lessThan": "2.6.35",
              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "4.19.270",
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              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.270",
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                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_hid: fix f_hidg lifetime vs cdev\n\nThe embedded struct cdev does not have its lifetime correctly tied to\nthe enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN\nis held open while the gadget is deleted.\n\nThis can readily be replicated with libusbgx\u0027s example programs (for\nconciseness - operating directly via configfs is equivalent):\n\n\tgadget-hid\n\texec 3\u003c\u003e /dev/hidg0\n\tgadget-vid-pid-remove\n\texec 3\u003c\u0026-\n\nPull the existing device up in to struct f_hidg and make use of the\ncdev_device_{add,del}() helpers.  This changes the lifetime of the\ndevice object to match struct f_hidg, but note that it is still added\nand deleted at the same time."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-22T13:23:25.136Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1cd7f156f6389918f760687fbbf133c86da93162"
        },
        {
          "url": "https://git.kernel.org/stable/c/c78c87c4e389b62f8892af7f59857447aa6d9797"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b6a53e447ec3d81623610c8c7ec5082b47dfdce"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3136b79705c2e3bba9c76adc5628af0215d798e"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e4b85d815b14bd4db2deea2a54264a23de8b896"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e08b7f5fa00e9d550851352bd0d1ba74ccffef2"
        },
        {
          "url": "https://git.kernel.org/stable/c/89ff3dfac604614287ad5aad9370c3f984ea3f4b"
        }
      ],
      "title": "usb: gadget: f_hid: fix f_hidg lifetime vs cdev",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50568",
    "datePublished": "2025-10-22T13:23:25.136Z",
    "dateReserved": "2025-10-22T13:20:23.760Z",
    "dateUpdated": "2025-10-22T13:23:25.136Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50568\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-22T14:15:41.657\",\"lastModified\":\"2025-10-22T21:12:48.953\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: gadget: f_hid: fix f_hidg lifetime vs cdev\\n\\nThe embedded struct cdev does not have its lifetime correctly tied to\\nthe enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN\\nis held open while the gadget is deleted.\\n\\nThis can readily be replicated with libusbgx\u0027s example programs (for\\nconciseness - operating directly via configfs is equivalent):\\n\\n\\tgadget-hid\\n\\texec 3\u003c\u003e /dev/hidg0\\n\\tgadget-vid-pid-remove\\n\\texec 3\u003c\u0026-\\n\\nPull the existing device up in to struct f_hidg and make use of the\\ncdev_device_{add,del}() helpers.  This changes the lifetime of the\\ndevice object to match struct f_hidg, but note that it is still added\\nand deleted at the same time.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b6a53e447ec3d81623610c8c7ec5082b47dfdce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1cd7f156f6389918f760687fbbf133c86da93162\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89ff3dfac604614287ad5aad9370c3f984ea3f4b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e08b7f5fa00e9d550851352bd0d1ba74ccffef2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e4b85d815b14bd4db2deea2a54264a23de8b896\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c78c87c4e389b62f8892af7f59857447aa6d9797\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d3136b79705c2e3bba9c76adc5628af0215d798e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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