of: unittest: fix use-after-free in testdrv_probe()

{
  "id": "9bc3c2d570d9b09ca96e58c533ccff9036af0596f1d921ae0eef9d39a2702f76",
  "url": "https://osv.dev/vulnerability/CVE-2026-45989",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "of: unittest: fix use-after-free in testdrv_probe()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: of: unittest: fix use-after-free in testdrv_probe() The function testdrv_probe() retrieves the device_node from the PCI device, applies an overlay, and then immediately calls of_node_put(dn). This releases the reference held by the PCI core, potentially freeing the node if the reference count drops to zero. Later, the same freed pointer 'dn' is passed to of_platform_default_populate(), leading to a use-after-free. The reference to pdev->dev.of_node is owned by the device model and should not be released by the driver. Remove the erroneous of_node_put() to prevent premature freeing.",
    "evidence": "osv:CVE-2026-45989",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.6.140",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.12.86",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.27",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45989",
      "aliases": [
        "CVE-2026-45989"
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      "affected": [
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              "type": "GIT",
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:27.270153801Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07fd339b2c253205794bea5d9b4b7548a4546c56",
        "https://git.kernel.org/stable/c/0ba03e06f037df704d9b032e36d417633e2326bc",
        "https://git.kernel.org/stable/c/5b6122a67a295f8a08b7c18d908a1bd974dfaec8",
        "https://git.kernel.org/stable/c/6b2023286d2c6ed3bf964fb92e34c9c14d42eb69",
        "https://git.kernel.org/stable/c/d68347b07b9801791c9eaab8f772770b52b8cd5c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45989.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45989",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
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      {
        "value": "CVE-2026-45989",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493674,
  "published_at": "2026-05-27T12:55:41.276+00:00"
}