FKIE_CVE-2025-40296

Vulnerability from fkie_nvd - Published: 2025-12-08 01:16 - Updated: 2026-10-14 22:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: platform/x86: int3472: Fix double free of GPIO device during unregister regulator_unregister() already frees the associated GPIO device. On ThinkPad X9 (Lunar Lake), this causes a double free issue that leads to random failures when other drivers (typically Intel THC) attempt to allocate interrupts. The root cause is that the reference count of the pinctrl_intel_platform module unexpectedly drops to zero when this driver defers its probe. This behavior can also be reproduced by unloading the module directly. Fix the issue by removing the redundant release of the GPIO device during regulator unregistration.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8113bb56c45bd17bac5144b55591f9cdbd6aabe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0f7a3f542c1698edb69075f25a3f846207facba
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/intel/int3472/clk_and_regulator.c",
            "include/linux/platform_data/x86/int3472.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b8113bb56c45bd17bac5144b55591f9cdbd6aabe",
              "status": "affected",
              "version": "1e5d088a52c207bcef6a43a6f6ffe162c514ed64",
              "versionType": "git"
            },
            {
              "lessThan": "f0f7a3f542c1698edb69075f25a3f846207facba",
              "status": "affected",
              "version": "1e5d088a52c207bcef6a43a6f6ffe162c514ed64",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/platform/x86/intel/int3472/clk_and_regulator.c",
            "include/linux/platform_data/x86/int3472.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: int3472: Fix double free of GPIO device during unregister\n\nregulator_unregister() already frees the associated GPIO device. On\nThinkPad X9 (Lunar Lake), this causes a double free issue that leads to\nrandom failures when other drivers (typically Intel THC) attempt to\nallocate interrupts. The root cause is that the reference count of the\npinctrl_intel_platform module unexpectedly drops to zero when this\ndriver defers its probe.\n\nThis behavior can also be reproduced by unloading the module directly.\n\nFix the issue by removing the redundant release of the GPIO device\nduring regulator unregistration."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nplatform/x86: int3472: Correcci\u00f3n de doble liberaci\u00f3n del dispositivo GPIO durante el desregistro\n\nregulator_unregister() ya libera el dispositivo GPIO asociado. En ThinkPad X9 (Lunar Lake), esto causa un problema de doble liberaci\u00f3n que conduce a fallos aleatorios cuando otros controladores (t\u00edpicamente Intel THC) intentan asignar interrupciones. La causa ra\u00edz es que el contador de referencias del m\u00f3dulo pinctrl_intel_platform cae inesperadamente a cero cuando este controlador aplaza su sondeo.\n\nEste comportamiento tambi\u00e9n puede ser reproducido descargando el m\u00f3dulo directamente.\n\nSoluciona el problema eliminando la liberaci\u00f3n redundante del dispositivo GPIO durante el desregistro del regulador."
    }
  ],
  "id": "CVE-2025-40296",
  "lastModified": "2026-10-14T22:10:00.210",
  "metrics": {},
  "published": "2025-12-08T01:16:01.690",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b8113bb56c45bd17bac5144b55591f9cdbd6aabe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f0f7a3f542c1698edb69075f25a3f846207facba"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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