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CVE-2026-92522

Estado: RecibidaAlta (7.3)—

In the Linux kernel, the following vulnerability has been resolved:

ACPI: processor: validate MADT IOAPIC entry bounds

The IOAPIC hotplug lookup parses both MADT and _MAT records directly. The MADT walk previously used a subtable's declared length to advance the cursor after only locating a generic header. The _MAT path likewise passed a generic header to the IOAPIC helper.

Validate that a current record has a complete generic header, that its declared length is contained in the available record range, and that a typed IOAPIC record contains the full fixed IOAPIC body before reading its fields. Use the same relation for both MADT and _MAT provider paths.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de validación de límites en kernel Linux (ACPI/MADT) accesible localmente sin privilegios, permite lectura/escritura de memoria adyacente y potencial DoS por acceso a zona IOAPIC no validada.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution PreventionThreat Intelligence ProgramFilter Network TrafficApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-92522",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.3,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "lessThan": "5601bd81bc290a724ed47797d22c16cba4d7ed9f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "lessThan": "ff82e3374e9103d046b2a82f4315d9a422ff097d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "lessThan": "2a5520065e76000f8c979d3d7b3d861ccaaecf1e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "lessThan": "8e67b58c04990817ac2dbf8ae03353be6a358cd4",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "74d84320f8e37955eb286a7777843d554e6e75b2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "lessThan": "4d8ecaa332c163f2b44aa5027bf061950b71b5f3",
              "versionType": "git"
            },
            {
              "status": "affected",
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            {
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              "lessThan": "2c50ffdc73f3a70d745d249f509fc290754121e6",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/acpi/processor_core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/acpi/processor_core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:55.150",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5601bd81bc290a724ed47797d22c16cba4d7ed9f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: validate MADT IOAPIC entry bounds\n\nThe IOAPIC hotplug lookup parses both MADT and _MAT records directly.\nThe MADT walk previously used a subtable's declared length to advance\nthe cursor after only locating a generic header.  The _MAT path likewise\npassed a generic header to the IOAPIC helper.\n\nValidate that a current record has a complete generic header, that its\ndeclared length is contained in the available record range, and that a\ntyped IOAPIC record contains the full fixed IOAPIC body before reading\nits fields.  Use the same relation for both MADT and _MAT provider\npaths."
    }
  ],
  "lastModified": "2026-09-18T18:18:14.130",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}