CVE-2025-40316 (GCVE-0-2025-40316)
Vulnerability from cvelistv5
Published
2025-12-08 00:46
Modified
2025-12-08 00:46
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
Impacted products
Vendor Product Version
Linux Linux Version: 7d98166183d627c0b9daca7672b2191fae0f8a03
Version: 31ce7c089b50c3d3056c37e0e25e7535e4428ae1
Version: 1f403699c40f0806a707a9a6eed3b8904224021a
Version: 1f403699c40f0806a707a9a6eed3b8904224021a
Version: fae58d0155a979a8c414bbc12db09dd4b2f910d0
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/mediatek/mtk_drm_drv.c"
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          "vendor": "Linux",
          "versions": [
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      "cpeApplicability": [
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      "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-12-08T00:46:43.210Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/926d002e6d7e2f1fd5c1b53cf6208153ee7d380d"
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      "title": "drm/mediatek: Fix device use-after-free on unbind",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40316",
    "datePublished": "2025-12-08T00:46:43.210Z",
    "dateReserved": "2025-04-16T07:20:57.186Z",
    "dateUpdated": "2025-12-08T00:46:43.210Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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