FKIE_CVE-2026-43181

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-11 20:53
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: gpio: sysfs: fix chip removal with GPIOs exported over sysfs Currently if we export a GPIO over sysfs and unbind the parent GPIO controller, the exported attribute will remain under /sys/class/gpio because once we remove the parent device, we can no longer associate the descriptor with it in gpiod_unexport() and never drop the final reference. Rework the teardown code: provide an unlocked variant of gpiod_unexport() and remove all exported GPIOs with the sysfs_lock taken before unregistering the parent device itself. This is done to prevent any new exports happening before we unregister the device completely.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/54f463494eb5bf193ef7d904a493474c451734dfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6766f59012301f1bf3f46c6e7149caca45d92309Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a645cc25904b0baf508b77a0402ce151212b9800Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: sysfs: fix chip removal with GPIOs exported over sysfs\n\nCurrently if we export a GPIO over sysfs and unbind the parent GPIO\ncontroller, the exported attribute will remain under /sys/class/gpio\nbecause once we remove the parent device, we can no longer associate the\ndescriptor with it in gpiod_unexport() and never drop the final\nreference.\n\nRework the teardown code: provide an unlocked variant of\ngpiod_unexport() and remove all exported GPIOs with the sysfs_lock taken\nbefore unregistering the parent device itself. This is done to prevent\nany new exports happening before we unregister the device completely."
    }
  ],
  "id": "CVE-2026-43181",
  "lastModified": "2026-05-11T20:53:27.147",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2026-05-06T12:16:36.670",
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}


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