fkie_cve-2025-38610
Vulnerability from fkie_nvd
Published
2025-08-19 17:15
Modified
2025-08-20 14:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw() The get_pd_power_uw() function can crash with a NULL pointer dereference when em_cpu_get() returns NULL. This occurs when a CPU becomes impossible during runtime, causing get_cpu_device() to return NULL, which propagates through em_cpu_get() and leads to a crash when em_span_cpus() dereferences the NULL pointer. Add a NULL check after em_cpu_get() and return 0 if unavailable, matching the existing fallback behavior in __dtpm_cpu_setup(). [ rjw: Drop an excess empty code line ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27914f2b795e2b58e9506f281dcdd98fef09d3c2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3ad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37c
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()\n\nThe get_pd_power_uw() function can crash with a NULL pointer dereference\nwhen em_cpu_get() returns NULL. This occurs when a CPU becomes impossible\nduring runtime, causing get_cpu_device() to return NULL, which propagates\nthrough em_cpu_get() and leads to a crash when em_span_cpus() dereferences\nthe NULL pointer.\n\nAdd a NULL check after em_cpu_get() and return 0 if unavailable,\nmatching the existing fallback behavior in __dtpm_cpu_setup().\n\n[ rjw: Drop an excess empty code line ]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powercap: dtpm_cpu: Correcci\u00f3n de la desreferencia de puntero nulo en get_pd_power_uw(). La funci\u00f3n get_pd_power_uw() puede fallar con una desreferencia de puntero nulo cuando em_cpu_get() devuelve NULL. Esto ocurre cuando una CPU se vuelve inoperativa durante la ejecuci\u00f3n, lo que provoca que get_cpu_device() devuelva NULL. Este comportamiento se propaga a trav\u00e9s de em_cpu_get() y provoca un fallo cuando em_span_cpus() desreferencia el puntero nulo. Se a\u00f1ade una comprobaci\u00f3n de NULL despu\u00e9s de em_cpu_get() y se devuelve 0 si no est\u00e1 disponible, coincidiendo con el comportamiento de reserva existente en __dtpm_cpu_setup(). [rjw: Omitir una l\u00ednea de c\u00f3digo vac\u00eda sobrante]"
    }
  ],
  "id": "CVE-2025-38610",
  "lastModified": "2025-08-20T14:40:17.713",
  "metrics": {},
  "published": "2025-08-19T17:15:39.490",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/27914f2b795e2b58e9506f281dcdd98fef09d3c2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3ad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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