CVE-2025-40194 (GCVE-0-2025-40194)

Vulnerability from cvelistv5 – Published: 2025-11-12 21:56 – Updated: 2026-05-11 21:44
VLAI
Title
cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()
Summary
In the Linux kernel, the following vulnerability has been resolved: cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request() The cpufreq_cpu_put() call in update_qos_request() takes place too early because the latter subsequently calls freq_qos_update_request() that indirectly accesses the policy object in question through the QoS request object passed to it. Fortunately, update_qos_request() is called under intel_pstate_driver_lock, so this issue does not matter for changing the intel_pstate operation mode, but it theoretically can cause a crash to occur on CPU device hot removal (which currently can only happen in virt, but it is formally supported nevertheless). Address this issue by modifying update_qos_request() to drop the reference to the policy later.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6843 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < 15ac9579ebdaf22a37d7f60b3a8efc1029732ef9 (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < bc26564bcc659beb6d977cd6eb394041ec2f2851 (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4 (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < 0a58d3e77b22b087a57831c87cafd360e144a5bd (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < 69a18ff6c60e8e113420f15355fad862cb45d38e (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3 (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < 57e4a6aadf12578b96a038373cffd54b3a58b092 (git)
Affected: da5c504c7aae96db68c4b38e2564a88e91842d89 , < 69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.4.301 , ≤ 5.4.* (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.195 , ≤ 5.15.* (semver)
Unaffected: 6.1.157 , ≤ 6.1.* (semver)
Unaffected: 6.6.113 , ≤ 6.6.* (semver)
Unaffected: 6.12.54 , ≤ 6.12.* (semver)
Unaffected: 6.17.4 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()\n\nThe cpufreq_cpu_put() call in update_qos_request() takes place too early\nbecause the latter subsequently calls freq_qos_update_request() that\nindirectly accesses the policy object in question through the QoS request\nobject passed to it.\n\nFortunately, update_qos_request() is called under intel_pstate_driver_lock,\nso this issue does not matter for changing the intel_pstate operation\nmode, but it theoretically can cause a crash to occur on CPU device hot\nremoval (which currently can only happen in virt, but it is formally\nsupported nevertheless).\n\nAddress this issue by modifying update_qos_request() to drop the\nreference to the policy later."
        }
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851"
        },
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          "url": "https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4"
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    "cveId": "CVE-2025-40194",
    "datePublished": "2025-11-12T21:56:32.025Z",
    "dateReserved": "2025-04-16T07:20:57.178Z",
    "dateUpdated": "2026-05-11T21:44:34.728Z",
    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()\n\nThe cpufreq_cpu_put() call in update_qos_request() takes place too early\nbecause the latter subsequently calls freq_qos_update_request() that\nindirectly accesses the policy object in question through the QoS request\nobject passed to it.\n\nFortunately, update_qos_request() is called under intel_pstate_driver_lock,\nso this issue does not matter for changing the intel_pstate operation\nmode, but it theoretically can cause a crash to occur on CPU device hot\nremoval (which currently can only happen in virt, but it is formally\nsupported nevertheless).\n\nAddress this issue by modifying update_qos_request() to drop the\nreference to the policy later."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncpufreq: intel_pstate: Correcci\u00f3n de un problema de ciclo de vida del objeto en update_qos_request()\n\nLa llamada a cpufreq_cpu_put() en update_qos_request() tiene lugar demasiado pronto porque esta \u00faltima posteriormente llama a freq_qos_update_request() que accede indirectamente al objeto de pol\u00edtica en cuesti\u00f3n a trav\u00e9s del objeto de solicitud de QoS que se le pasa.\n\nAfortunadamente, update_qos_request() es llamada bajo intel_pstate_driver_lock, por lo que este problema no importa para cambiar el modo de operaci\u00f3n de intel_pstate, pero te\u00f3ricamente puede causar un fallo en la extracci\u00f3n en caliente de un dispositivo de CPU (lo cual actualmente solo puede ocurrir en entornos virtuales, pero est\u00e1 formalmente soportado de todos modos).\n\nSe aborda este problema modificando update_qos_request() para liberar la referencia a la pol\u00edtica m\u00e1s tarde."
          }
        ],
        "id": "CVE-2025-40194",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {},
        "published": "2025-11-12T22:15:46.427",
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            "url": "https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3"
          },
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T02:56:50+00:00",
      "cve": "CVE-2025-40194",
      "id": "CVE-2025-40194",
      "initial_release_date": "2025-11-12T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cpufreq: intel_pstate: Fix object lifecycle issue in update_qos_request()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40194.json",
      "version": "3"
    }
  }
}



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  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.