fkie_cve-2025-40316
Vulnerability from fkie_nvd
Published
2025-12-08 01:16
Modified
2025-12-08 18:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Fix device use-after-free on unbind A recent change fixed device reference leaks when looking up drm platform device driver data during bind() but failed to remove a partial fix which had been added by commit 80805b62ea5b ("drm/mediatek: Fix kobject put for component sub-drivers"). This results in a reference imbalance on component bind() failures and on unbind() which could lead to a user-after-free. Make sure to only drop the references after retrieving the driver data by effectively reverting the previous partial fix. Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0142fe895986addf35885b43440718e567121155
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ba827e09eb586e952d10e39406fa02d10bb591e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/926d002e6d7e2f1fd5c1b53cf6208153ee7d380d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5a896f8315de358a2932e2c23c42d550256046a
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Fix device use-after-free on unbind\n\nA recent change fixed device reference leaks when looking up drm\nplatform device driver data during bind() but failed to remove a partial\nfix which had been added by commit 80805b62ea5b (\"drm/mediatek: Fix\nkobject put for component sub-drivers\").\n\nThis results in a reference imbalance on component bind() failures and\non unbind() which could lead to a user-after-free.\n\nMake sure to only drop the references after retrieving the driver data\nby effectively reverting the previous partial fix.\n\nNote that holding a reference to a device does not prevent its driver\ndata from going away so there is no point in keeping the reference."
    }
  ],
  "id": "CVE-2025-40316",
  "lastModified": "2025-12-08T18:26:19.900",
  "metrics": {},
  "published": "2025-12-08T01:16:04.147",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0142fe895986addf35885b43440718e567121155"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8ba827e09eb586e952d10e39406fa02d10bb591e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/926d002e6d7e2f1fd5c1b53cf6208153ee7d380d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a5a896f8315de358a2932e2c23c42d550256046a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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