fkie_cve-2025-37870
Vulnerability from fkie_nvd
Published
2025-05-09 07:16
Modified
2025-05-12 17:32
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f
Impacted products
Vendor Product Version


To clipboard 

{
  "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."
    }
  ],
  "id": "CVE-2025-37870",
  "lastModified": "2025-05-12T17:32:32.760",
  "metrics": {},
  "published": "2025-05-09T07:16:08.107",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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