CVE-2022-50494 (GCVE-0-2022-50494)

Vulnerability from cvelistv5 – Published: 2025-10-04 15:43 – Updated: 2025-12-23 13:29
VLAI?
Title
thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash
Summary
In the Linux kernel, the following vulnerability has been resolved: thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash When CPU 0 is offline and intel_powerclamp is used to inject idle, it generates kernel BUG: BUG: using smp_processor_id() in preemptible [00000000] code: bash/15687 caller is debug_smp_processor_id+0x17/0x20 CPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57 Call Trace: <TASK> dump_stack_lvl+0x49/0x63 dump_stack+0x10/0x16 check_preemption_disabled+0xdd/0xe0 debug_smp_processor_id+0x17/0x20 powerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp] ... ... Here CPU 0 is the control CPU by default and changed to the current CPU, if CPU 0 offlined. This check has to be performed under cpus_read_lock(), hence the above warning. Use get_cpu() instead of smp_processor_id() to avoid this BUG. [ rjw: Subject edits ]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 3e799e815097febbcb81b472285be824f5d089f9 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 0f91f66c568b316b19cb042cf50584467b3bdff4 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 6904727db0eb62fb0c2dce1cf331c341d97ee4b7 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 5a646c38f648185ee2c62f2a19da3c6f04e27612 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 513943bf879d45005213e6f5cfb7d9e9943f589f (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 5614908434451aafbf9b24cb5247cf1d21269f76 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 6e2a347b304224b2aeb1c0ea000d1cf8a02cc592 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 418fae0700e85a498062424f8656435c32cdb200 (git)
Affected: d6d71ee4a14ae602db343ec48c491851d7ec5267 , < 68b99e94a4a2db6ba9b31fe0485e057b9354a640 (git)
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    Linux Linux Affected: 3.9
Unaffected: 0 , < 3.9 (semver)
Unaffected: 4.9.331 , ≤ 4.9.* (semver)
Unaffected: 4.14.296 , ≤ 4.14.* (semver)
Unaffected: 4.19.262 , ≤ 4.19.* (semver)
Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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            "drivers/thermal/intel/intel_powerclamp.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash\n\nWhen CPU 0 is offline and intel_powerclamp is used to inject\nidle, it generates kernel BUG:\n\nBUG: using smp_processor_id() in preemptible [00000000] code: bash/15687\ncaller is debug_smp_processor_id+0x17/0x20\nCPU: 4 PID: 15687 Comm: bash Not tainted 5.19.0-rc7+ #57\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x49/0x63\ndump_stack+0x10/0x16\ncheck_preemption_disabled+0xdd/0xe0\ndebug_smp_processor_id+0x17/0x20\npowerclamp_set_cur_state+0x7f/0xf9 [intel_powerclamp]\n...\n...\n\nHere CPU 0 is the control CPU by default and changed to the current CPU,\nif CPU 0 offlined. This check has to be performed under cpus_read_lock(),\nhence the above warning.\n\nUse get_cpu() instead of smp_processor_id() to avoid this BUG.\n\n[ rjw: Subject edits ]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:29:40.081Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3e799e815097febbcb81b472285be824f5d089f9"
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        {
          "url": "https://git.kernel.org/stable/c/0f91f66c568b316b19cb042cf50584467b3bdff4"
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          "url": "https://git.kernel.org/stable/c/5a646c38f648185ee2c62f2a19da3c6f04e27612"
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          "url": "https://git.kernel.org/stable/c/513943bf879d45005213e6f5cfb7d9e9943f589f"
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          "url": "https://git.kernel.org/stable/c/418fae0700e85a498062424f8656435c32cdb200"
        },
        {
          "url": "https://git.kernel.org/stable/c/68b99e94a4a2db6ba9b31fe0485e057b9354a640"
        }
      ],
      "title": "thermal: intel_powerclamp: Use get_cpu() instead of smp_processor_id() to avoid crash",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50494",
    "datePublished": "2025-10-04T15:43:46.562Z",
    "dateReserved": "2025-10-04T15:39:19.464Z",
    "dateUpdated": "2025-12-23T13:29:40.081Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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