FKIE_CVE-2025-39902

Vulnerability from fkie_nvd - Published: 2025-10-01 08:15 - Updated: 2026-10-19 21:10
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.

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          "vendor": "Linux",
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          "product": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "2.6.22"
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              "lessThan": "2.6.22",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.4.299",
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            },
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              "status": "unaffected",
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.151",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.105",
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              "status": "unaffected",
              "version": "6.16.6",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slub: avoid accessing metadata when pointer is invalid in object_err()\n\nobject_err() reports details of an object for further debugging, such as\nthe freelist pointer, redzone, etc. However, if the pointer is invalid,\nattempting to access object metadata can lead to a crash since it does\nnot point to a valid object.\n\nOne known path to the crash is when alloc_consistency_checks()\ndetermines the pointer to the allocated object is invalid because of a\nfreelist corruption, and calls object_err() to report it. The debug code\nshould report and handle the corruption gracefully and not crash in the\nprocess.\n\nIn case the pointer is NULL or check_valid_pointer() returns false for\nthe pointer, only print the pointer value and skip accessing metadata."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmm/slub: evitar acceder a metadatos cuando el puntero es inv\u00e1lido en object_err()\n\nobject_err() informa detalles de un objeto para depuraci\u00f3n adicional, como el puntero de la freelist, la redzone, etc. Sin embargo, si el puntero es inv\u00e1lido, intentar acceder a los metadatos del objeto puede provocar un fallo ya que no apunta a un objeto v\u00e1lido.\n\nUna ruta conocida al fallo es cuando alloc_consistency_checks() determina que el puntero al objeto asignado es inv\u00e1lido debido a una corrupci\u00f3n de la freelist, y llama a object_err() para informarlo. El c\u00f3digo de depuraci\u00f3n deber\u00eda informar y manejar la corrupci\u00f3n de manera elegante y no fallar en el proceso.\n\nEn caso de que el puntero sea NULL o check_valid_pointer() devuelva falso para el puntero, solo imprimir el valor del puntero y omitir el acceso a los metadatos."
    }
  ],
  "id": "CVE-2025-39902",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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        "ssvcData": {
          "id": "CVE-2025-39902",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-15T21:54:38.930497Z",
          "version": "2.0.3"
        }
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  },
  "published": "2025-10-01T08:15:32.993",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}



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