CVE-2025-38518 (GCVE-0-2025-38518)
Vulnerability from cvelistv5
Published
2025-08-16 10:55
Modified
2025-08-16 10:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Disable INVLPGB on Zen2 AMD Cyan Skillfish (Family 17h, Model 47h, Stepping 0h) has an issue that causes system oopses and panics when performing TLB flush using INVLPGB. However, the problem is that that machine has misconfigured CPUID and should not report the INVLPGB bit in the first place. So zap the kernel's representation of the flag so that nothing gets confused. [ bp: Massage. ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/357f121517924e3ec3021f9d0dd0189adcd09867
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a74bb5f202dabddfea96abc1328fcedae8aa140a
Impacted products
Vendor Product Version
Linux Linux Version: 767ae437a32d644786c0779d0d54492ff9cbe574
Version: 767ae437a32d644786c0779d0d54492ff9cbe574
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   Linux Linux Version: 6.15
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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                  "vulnerable": true
                },
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              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/CPU/AMD: Disable INVLPGB on Zen2\n\nAMD Cyan Skillfish (Family 17h, Model 47h, Stepping 0h) has an issue\nthat causes system oopses and panics when performing TLB flush using\nINVLPGB.\n\nHowever, the problem is that that machine has misconfigured CPUID and\nshould not report the INVLPGB bit in the first place. So zap the\nkernel\u0027s representation of the flag so that nothing gets confused.\n\n  [ bp: Massage. ]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-16T10:55:05.039Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/a74bb5f202dabddfea96abc1328fcedae8aa140a"
        }
      ],
      "title": "x86/CPU/AMD: Disable INVLPGB on Zen2",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38518",
    "datePublished": "2025-08-16T10:55:05.039Z",
    "dateReserved": "2025-04-16T04:51:24.023Z",
    "dateUpdated": "2025-08-16T10:55:05.039Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38518\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-16T11:15:45.020\",\"lastModified\":\"2025-08-18T20:16:28.750\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nx86/CPU/AMD: Disable INVLPGB on Zen2\\n\\nAMD Cyan Skillfish (Family 17h, Model 47h, Stepping 0h) has an issue\\nthat causes system oopses and panics when performing TLB flush using\\nINVLPGB.\\n\\nHowever, the problem is that that machine has misconfigured CPUID and\\nshould not report the INVLPGB bit in the first place. So zap the\\nkernel\u0027s representation of the flag so that nothing gets confused.\\n\\n  [ bp: Massage. ]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/CPU/AMD: Desactivar INVLPGB en Zen2 AMD Cyan Skillfish (Familia 17h, Modelo 47h, Stepping 0h) presenta un problema que provoca errores y p\u00e1nicos del sistema al realizar el vaciado de TLB con INVLPGB. Sin embargo, el problema radica en que esa m\u00e1quina tiene un CPUID mal configurado y no deber\u00eda informar el bit INVLPGB. Por lo tanto, elimine la representaci\u00f3n del indicador en el kernel para evitar confusiones. [bp: Masaje].\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/357f121517924e3ec3021f9d0dd0189adcd09867\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a74bb5f202dabddfea96abc1328fcedae8aa140a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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