CVE-2025-37870 (GCVE-0-2025-37870)
Vulnerability from cvelistv5
Published
2025-05-09 06:43
Modified
2025-07-11 17:21
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Version: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Version: 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
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{
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c",
            "drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.15"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "negate": false,
              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-11T17:21:42.047Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f"
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      ],
      "title": "drm/amd/display: prevent hang on link training fail",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37870",
    "datePublished": "2025-05-09T06:43:59.074Z",
    "dateReserved": "2025-04-16T04:51:23.959Z",
    "dateUpdated": "2025-07-11T17:21:42.047Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-09T07:16:08.107\",\"lastModified\":\"2025-05-12T17:32:32.760\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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 qu\u00e9] Cuando el entrenamiento del enlace falla, el reloj f\u00edsico se desactiva. Sin embargo, en enable_streams, se asume que el entrenamiento del enlace se realiz\u00f3 correctamente y el multiplexor selecciona el reloj f\u00edsico, lo que provoca un bloqueo al escribir en un registro. [C\u00f3mo] 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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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