GHSA-5J9P-C334-FVCP

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-06-14 06:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

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

The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free.

Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-46288"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T17:16:46Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: unittest: fix use-after-free in of_unittest_changeset()\n\nThe variable \u0027parent\u0027 is assigned the value of \u0027nchangeset\u0027 earlier in the\nfunction, meaning both point to the same struct device_node. The call to\nof_node_put(nchangeset) can decrement the reference count to zero and\nfree the node if there are no other holders. After that, the code still\nuses \u0027parent\u0027 to check for the presence of a property and to read a\nstring property, leading to a use-after-free.\n\nFix this by moving the of_node_put() call after the last access to\n\u0027parent\u0027, avoiding the UAF.",
  "id": "GHSA-5j9p-c334-fvcp",
  "modified": "2026-06-14T06:30:23Z",
  "published": "2026-06-08T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46288"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fdad20b7975bdc32e85b45f8f7c640f6687b81f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f0f0926f3010b10cff5e93446258f971e42f2fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faecdd423c27f0d6090156a435ba9dbbac0eaddb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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