ghsa-v9q6-qjf3-fr39
Vulnerability from github
Published
2025-12-09 18:30
Modified
2025-12-09 18:30
Details

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

of: overlay: Call of_changeset_init() early

When of_overlay_fdt_apply() fails, the changeset may be partially applied, and the caller is still expected to call of_overlay_remove() to clean up this partial state.

However, of_overlay_apply() calls of_resolve_phandles() before init_overlay_changeset(). Hence if the overlay fails to apply due to an unresolved symbol, the overlay_changeset.cset.entries list is still uninitialized, and cleanup will crash with a NULL-pointer dereference in overlay_removal_is_ok().

Fix this by moving the call to of_changeset_init() from init_overlay_changeset() to of_overlay_fdt_apply(), where all other early initialization is done.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53856"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-09T16:17:26Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nof: overlay: Call of_changeset_init() early\n\nWhen of_overlay_fdt_apply() fails, the changeset may be partially\napplied, and the caller is still expected to call of_overlay_remove() to\nclean up this partial state.\n\nHowever, of_overlay_apply() calls of_resolve_phandles() before\ninit_overlay_changeset().  Hence if the overlay fails to apply due to an\nunresolved symbol, the overlay_changeset.cset.entries list is still\nuninitialized, and cleanup will crash with a NULL-pointer dereference in\noverlay_removal_is_ok().\n\nFix this by moving the call to of_changeset_init() from\ninit_overlay_changeset() to of_overlay_fdt_apply(), where all other\nearly initialization is done.",
  "id": "GHSA-v9q6-qjf3-fr39",
  "modified": "2025-12-09T18:30:34Z",
  "published": "2025-12-09T18:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53856"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01bb96ad38089f5cc6de7746dac13437d35eb1dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3fb210cd521c9efcb211e9f5ce40fc907200bf13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9515ff4fb142b690a0d2b58782b15903b990dba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be86241bf5d1efd16d8a7231c13b33459c5d755d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c403c81b577a67fe9ec6a2e89d143256487be50f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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