ghsa-jj6q-jr89-p4h6
Vulnerability from github
Published
2025-08-22 18:31
Modified
2025-11-03 18:31
Details

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

regulator: core: fix NULL dereference on unbind due to stale coupling data

Failing to reset coupling_desc.n_coupled after freeing coupled_rdevs can lead to NULL pointer dereference when regulators are accessed post-unbind.

This can happen during runtime PM or other regulator operations that rely on coupling metadata.

For example, on ridesx4, unbinding the 'reg-dummy' platform device triggers a panic in regulator_lock_recursive() due to stale coupling state.

Ensure n_coupled is set to 0 to prevent access to invalid pointers.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38668"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-22T16:15:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: core: fix NULL dereference on unbind due to stale coupling data\n\nFailing to reset coupling_desc.n_coupled after freeing coupled_rdevs can\nlead to NULL pointer dereference when regulators are accessed post-unbind.\n\nThis can happen during runtime PM or other regulator operations that rely\non coupling metadata.\n\nFor example, on ridesx4, unbinding the \u0027reg-dummy\u0027 platform device triggers\na panic in regulator_lock_recursive() due to stale coupling state.\n\nEnsure n_coupled is set to 0 to prevent access to invalid pointers.",
  "id": "GHSA-jj6q-jr89-p4h6",
  "modified": "2025-11-03T18:31:36Z",
  "published": "2025-08-22T18:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38668"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/233d3c54c9620e95193923859ea1d0b0f5d748ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d4261dbb3335221fd9c6e69f909ba79ee6663a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c49eac796681e250e34156bafb643930310bd4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7574892e259bbb16262ebfb4b65a2054a5e03a49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/800a2cfb2df7f96b3fb48910fc595e0215f6b019"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca46946a482238b0cdea459fb82fc837fb36260e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca9bef9ba1a6be640c87bf802d2e9e696021576a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7e59c5fd7a0f5e16e75a30a89ea2c4ab88612b8"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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