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CVE-2025-38240

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr

The function mtk_dp_wait_hpd_asserted() may be called before the `mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe

Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted().

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While touching these prints, also add the error code to them to make future debugging easier.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-38240",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
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  },
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          "product": "Linux",
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          "programFiles": [
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          "defaultStatus": "unaffected"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "status": "unaffected",
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            },
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              "status": "unaffected",
              "version": "6.12.23",
              "versionType": "semver",
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            },
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              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver",
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          "programFiles": [
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          "defaultStatus": "affected"
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  ],
  "published": "2025-04-18T07:15:43.510",
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      "url": "https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84",
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
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    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr\n\nThe function mtk_dp_wait_hpd_asserted() may be called before the\n`mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach().\nSpecifically it can be called via this callpath:\n - mtk_edp_wait_hpd_asserted\n - [panel probe]\n - dp_aux_ep_probe\n\nUsing \"drm\" level prints anywhere in this callpath causes a NULL\npointer dereference. Change the error message directly in\nmtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the\nerror messages in mtk_dp_parse_capabilities(), which is called by\nmtk_dp_wait_hpd_asserted().\n\nWhile touching these prints, also add the error code to them to make\nfuture debugging easier."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/mediatek: dp: drm_err => dev_err en la ruta HPD para evitar un puntero nulo. La función mtk_dp_wait_hpd_asserted() puede llamarse antes de asignar el puntero `mtk_dp->drm_dev` en mtk_dp_bridge_attach(). Específicamente, se puede llamar a través de esta ruta de llamada: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe El uso de impresiones de nivel \"drm\" en cualquier parte de esta ruta de llamada provoca una desreferencia del puntero nulo. Cambie el mensaje de error directamente en mtk_dp_wait_hpd_asserted() a dev_err() para evitar esto. Cambie también los mensajes de error en mtk_dp_parse_capabilities(), que es llamado por mtk_dp_wait_hpd_asserted(). Al tocar estas impresiones, agregue también el código de error para facilitar la depuración futura."
    }
  ],
  "lastModified": "2026-06-17T09:16:27.637",
  "configurations": [
    {
      "nodes": [
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          "negate": false,
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}