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CVE-2025-37870

Estado: AnalizadaMedia (5.5)—

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

drm/amd/display: prevent hang on link training fail

[Why] When link training fails, the phy clock will be disabled. However, in enable_streams, it is assumed that link training succeeded and the mux selects the phy clock, causing a hang when a register write is made.

[How] When enable_stream is hit, check if link training failed. If it did, fall back to the ref clock to avoid a hang and keep the system in a recoverable state.

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-2025-37870",
  "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"
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        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "lessThan": "0363c03672cd3191f037905bf981eb523a3b71b1",
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          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c",
            "drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"
          ],
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              "version": "6.3"
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              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
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          ],
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c",
            "drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"
          ],
          "defaultStatus": "affected"
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    }
  ],
  "published": "2025-05-09T07:16:08.107",
  "references": [
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      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa",
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: prevent hang on link training fail\n\n[Why]\nWhen link training fails, the phy clock will be disabled. However, in\nenable_streams, it is assumed that link training succeeded and the\nmux selects the phy clock, causing a hang when a register write is made.\n\n[How]\nWhen enable_stream is hit, check if link training failed. If it did, fall\nback to the ref clock to avoid a hang and keep the system in a recoverable\nstate."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: impide el bloqueo en caso de fallo del entrenamiento del enlace [Por qué] Cuando el entrenamiento del enlace falla, el reloj físico se desactiva. Sin embargo, en enable_streams, se asume que el entrenamiento del enlace se realizó correctamente y el multiplexor selecciona el reloj físico, lo que provoca un bloqueo al escribir en un registro. [Cómo] Cuando se alcanza enable_stream, se comprueba si el entrenamiento del enlace ha fallado. En caso afirmativo, se recurre al reloj de referencia para evitar un bloqueo y mantener el sistema en un estado recuperable."
    }
  ],
  "lastModified": "2026-06-17T09:15:36.297",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9BBB933D-0FAB-422A-98C2-3B419233C02E",
              "versionEndExcluding": "6.12.25",
              "versionStartIncluding": "6.3"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.14.4",
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          ],
          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}