gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()

{
  "id": "0bd0ad3f44a4d181bd6cb698fba727bc61dcfdd5a401d09f19f8c9d163f7bc94",
  "url": "https://osv.dev/vulnerability/CVE-2026-31732",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: gpio: Fix resource leaks on errors in gpiochip_add_data_with_key() Since commit aab5c6f20023 (\"gpio: set device type for GPIO chips\"), `gdev->dev.release` is unset. As a result, the reference count to `gdev->dev` isn't dropped on the error handling paths. Drop the reference on errors. Also reorder the instructions to make the error handling simpler. Now gpiochip_add_data_with_key() roughly looks like: >>> Some memory allocation. Go to ERR ZONE 1 on errors. >>> device_initialize(). gpiodev_release() takes over the responsibility for freeing the resources of `gdev->dev`. The subsequent error handling paths shouldn't go through ERR ZONE 1 again which leads to double free. >>> Some initialization mainly on `gdev`. >>> The rest of initialization. Go to ERR ZONE 2 on errors. >>> Chip registration success and exit. >>> ERR ZONE 2. gpio_device_put() and exit. >>> ERR ZONE 1.",
    "evidence": "osv:CVE-2026-31732",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.95",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.22",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-31732",
      "aliases": [
        "CVE-2026-31732"
      ],
      "affected": [
        {
          "ranges": [
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                {
                  "fixed": "16fdabe143fce2cbf89139677728e17e21b46c28"
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        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.9.0"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.22"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "fixed": "6.19.12"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31732.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.515859044Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/16fdabe143fce2cbf89139677728e17e21b46c28",
        "https://git.kernel.org/stable/c/a500e1837c4266ddb05b39b3e1cc71f49a43ffa5",
        "https://git.kernel.org/stable/c/f0cf9c7b7c281956cc0dec163132cd96f76e1d60",
        "https://git.kernel.org/stable/c/fb4584d2b324c522404c733c65840a1a6519ada8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31732.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-31732",
        "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/2026/31xxx/CVE-2026-31732.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-31732",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 504620,
  "published_at": "2026-05-01T14:14:30.844+00:00"
}