CVE-2023-54027 (GCVE-0-2023-54027)
Vulnerability from cvelistv5
Published
2025-12-24 10:55
Modified
2025-12-24 10:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: core: Prevent invalid memory access when there is no parent Commit 813665564b3d ("iio: core: Convert to use firmware node handle instead of OF node") switched the kind of nodes to use for label retrieval in device registration. Probably an unwanted change in that commit was that if the device has no parent then NULL pointer is accessed. This is what happens in the stock IIO dummy driver when a new entry is created in configfs: # mkdir /sys/kernel/config/iio/devices/dummy/foo BUG: kernel NULL pointer dereference, address: ... ... Call Trace: __iio_device_register iio_dummy_probe Since there seems to be no reason to make a parent device of an IIO dummy device mandatory, let’s prevent the invalid memory access in __iio_device_register when the parent device is NULL. With this change, the IIO dummy driver works fine with configfs.
References
Impacted products
Vendor Product Version
Linux Linux Version: 813665564b3d7c74412fe2877520f1d254ce948a
Version: 813665564b3d7c74412fe2877520f1d254ce948a
Version: 813665564b3d7c74412fe2877520f1d254ce948a
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iio/industrialio-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
          "versions": [
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              "version": "5.19"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.5",
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      "cpeApplicability": [
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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\niio: core: Prevent invalid memory access when there is no parent\n\nCommit 813665564b3d (\"iio: core: Convert to use firmware node handle\ninstead of OF node\") switched the kind of nodes to use for label\nretrieval in device registration.  Probably an unwanted change in that\ncommit was that if the device has no parent then NULL pointer is\naccessed.  This is what happens in the stock IIO dummy driver when a\nnew entry is created in configfs:\n\n  # mkdir /sys/kernel/config/iio/devices/dummy/foo\n  BUG: kernel NULL pointer dereference, address: ...\n  ...\n  Call Trace:\n  __iio_device_register\n  iio_dummy_probe\n\nSince there seems to be no reason to make a parent device of an IIO\ndummy device mandatory, let\u2019s prevent the invalid memory access in\n__iio_device_register when the parent device is NULL.  With this\nchange, the IIO dummy driver works fine with configfs."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:55:55.890Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/312f04ede209f0a186799fe8e64a19b49700d5dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/a4b34cccff14ce74bb7d77fbfd56e7c9d7c28a97"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2a69969908fcaf68596dfc04369af0fe2e1d2f7"
        }
      ],
      "title": "iio: core: Prevent invalid memory access when there is no parent",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54027",
    "datePublished": "2025-12-24T10:55:55.890Z",
    "dateReserved": "2025-12-24T10:53:46.180Z",
    "dateUpdated": "2025-12-24T10:55:55.890Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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