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CVE-2024-49872

Estado: AnalizadaMedia (4.7)—

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

mm/gup: fix memfd_pin_folios alloc race panic

If memfd_pin_folios tries to create a hugetlb page, but someone else already did, then folio gets the value -EEXIST here:

then on the next trip through the "while start_idx" loop we panic here:

To fix, set the folio to NULL on error.

Detalles técnicos trazas, registros y código del informe original
        folio = memfd_alloc_folio(memfd, start_idx);
        if (IS_ERR(folio)) {
                ret = PTR_ERR(folio);
                if (ret != -EEXIST)
                        goto err;

        if (folio) {
                folio_put(folio);

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2024-49872",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-49872",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-10-22T13:46:48.511178Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1
      }
    ]
  },
  "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": "89c1905d9c140372b7f50ef48f42378cf85d9bc5",
              "lessThan": "e28f39b359c0cfdcc011603e51187085a5f1e5e3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "89c1905d9c140372b7f50ef48f42378cf85d9bc5",
              "lessThan": "ce645b9fdc78ec5d28067286e92871ddae6817d5",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "mm/gup.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.11.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.11.*"
            },
            {
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "mm/gup.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2024-10-21T18:15:08.587",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/ce645b9fdc78ec5d28067286e92871ddae6817d5",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e28f39b359c0cfdcc011603e51187085a5f1e5e3",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/gup: fix memfd_pin_folios alloc race panic\n\nIf memfd_pin_folios tries to create a hugetlb page, but someone else\nalready did, then folio gets the value -EEXIST here:\n\n        folio = memfd_alloc_folio(memfd, start_idx);\n        if (IS_ERR(folio)) {\n                ret = PTR_ERR(folio);\n                if (ret != -EEXIST)\n                        goto err;\n\nthen on the next trip through the \"while start_idx\" loop we panic here:\n\n        if (folio) {\n                folio_put(folio);\n\nTo fix, set the folio to NULL on error."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/gup: corregir pánico en ejecución de asignación de memfd_pin_folios Si memfd_pin_folios intenta crear una página hugetlb, pero alguien más ya lo hizo, entonces folio obtiene el valor -EEXIST aquí: folio = memfd_alloc_folio(memfd, start_idx); if (IS_ERR(folio)) { ret = PTR_ERR(folio); if (ret != -EEXIST) goto err; luego en el siguiente viaje a través del bucle \"while start_idx\" entramos en pánico aquí: if (folio) { folio_put(folio); Para corregirlo, configure folio en NULL en caso de error."
    }
  ],
  "lastModified": "2026-06-17T08:00:37.747",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9",
              "versionEndExcluding": "6.11.3",
              "versionStartIncluding": "6.11"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}