CVE-2025-40316 (GCVE-0-2025-40316)

Vulnerability from cvelistv5 – Published: 2025-12-08 00:46 – Updated: 2026-05-23 16:02
VLAI
Title
drm/mediatek: Fix device use-after-free on unbind
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7d98166183d627c0b9daca7672b2191fae0f8a03 , < a5a896f8315de358a2932e2c23c42d550256046a (git)
Affected: 31ce7c089b50c3d3056c37e0e25e7535e4428ae1 , < 0142fe895986addf35885b43440718e567121155 (git)
Affected: 1f403699c40f0806a707a9a6eed3b8904224021a , < 8ba827e09eb586e952d10e39406fa02d10bb591e (git)
Affected: 1f403699c40f0806a707a9a6eed3b8904224021a , < 926d002e6d7e2f1fd5c1b53cf6208153ee7d380d (git)
Affected: fae58d0155a979a8c414bbc12db09dd4b2f910d0 (git)
Affected: 6.6.105 , < 6.6.117 (semver)
Affected: 6.12.45 , < 6.12.58 (semver)
Affected: 6.16.5 , < 6.17 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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    "dateReserved": "2025-04-16T07:20:57.186Z",
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          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/mediatek: Solucionar el uso despu\u00e9s de liberaci\u00f3n del dispositivo al desvincular\n\nUn cambio reciente solucion\u00f3 las fugas de referencia del dispositivo al buscar datos del controlador del dispositivo de plataforma drm durante bind() pero no elimin\u00f3 una soluci\u00f3n parcial que hab\u00eda sido a\u00f1adida por el commit 80805b62ea5b (\u0027drm/mediatek: Solucionar kobject put para subcontroladores de componentes\u0027).\n\nEsto resulta en un desequilibrio de referencias en fallos de bind() de componentes y en unbind() lo que podr\u00eda llevar a un uso despu\u00e9s de liberaci\u00f3n.\n\nAseg\u00farese de solo liberar las referencias despu\u00e9s de recuperar los datos del controlador revirtiendo efectivamente la soluci\u00f3n parcial anterior.\n\nTenga en cuenta que mantener una referencia a un dispositivo no evita que sus datos de controlador desaparezcan, por lo que no tiene sentido mantener la referencia."
          }
        ],
        "id": "CVE-2025-40316",
        "lastModified": "2026-10-14T22:10:00.210",
        "metrics": {},
        "published": "2025-12-08T01:16:04.147",
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        "vulnStatus": "Deferred"
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      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:19:52+00:00",
      "cve": "CVE-2025-40316",
      "id": "CVE-2025-40316",
      "initial_release_date": "2025-12-08T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/mediatek: Fix device use-after-free on unbind",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40316.json",
      "version": "3"
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}



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