fkie_cve-2025-40194
Vulnerability from fkie_nvd
Published
2025-11-12 22:15
Modified
2025-11-14 16:42
Severity ?
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a58d3e77b22b087a57831c87cafd360e144a5bd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57e4a6aadf12578b96a038373cffd54b3a58b092
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69a18ff6c60e8e113420f15355fad862cb45d38e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851
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\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."
    }
  ],
  "id": "CVE-2025-40194",
  "lastModified": "2025-11-14T16:42:30.503",
  "metrics": {},
  "published": "2025-11-12T22:15:46.427",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0a58d3e77b22b087a57831c87cafd360e144a5bd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/15ac9579ebdaf22a37d7f60b3a8efc1029732ef9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/57e4a6aadf12578b96a038373cffd54b3a58b092"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/69a18ff6c60e8e113420f15355fad862cb45d38e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/69e5d50fcf4093fb3f9f41c4f931f12c2ca8c467"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad4e8f9bdbef11a19b7cb93e7f313bf59bdcc3b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ba63d4e9857a72a89e71a4eff9f2cc8c283e94c3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bc26564bcc659beb6d977cd6eb394041ec2f2851"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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