FKIE_CVE-2025-40067

Vulnerability from fkie_nvd - Published: 2025-10-28 12:15 - Updated: 2026-10-19 21:10
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist Index allocation requires at least one bit in the $BITMAP attribute to track usage of index entries. If the bitmap is empty while index blocks are already present, this reflects on-disk corruption. syzbot triggered this condition using a malformed NTFS image. During a rename() operation involving a long filename (which spans multiple index entries), the empty bitmap allowed the name to be added without valid tracking. Subsequent deletion of the original entry failed with -ENOENT, due to unexpected index state. Reject such cases by verifying that the bitmap is not empty when index blocks exist.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/039ddf353cc33f6546a87ec1ac3210637d714bec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0dc7117da8f92dd5fe077d712a756eccbe377d40
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/978aac54e93ea35aab20b32ae393d3d33964e7ae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/be66551da203862c689c12e1d35ce87217c017c1
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/index.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "978aac54e93ea35aab20b32ae393d3d33964e7ae",
              "status": "affected",
              "version": "b35a50d639ca5259466ef5fea85529bb4fb17d5b",
              "versionType": "git"
            },
            {
              "lessThan": "be66551da203862c689c12e1d35ce87217c017c1",
              "status": "affected",
              "version": "3ed2cc6a6e93fbeb8c0cafce1e7fb1f64a331dcc",
              "versionType": "git"
            },
            {
              "lessThan": "039ddf353cc33f6546a87ec1ac3210637d714bec",
              "status": "affected",
              "version": "d99208b91933fd2a58ed9ed321af07dacd06ddc3",
              "versionType": "git"
            },
            {
              "lessThan": "0dc7117da8f92dd5fe077d712a756eccbe377d40",
              "status": "affected",
              "version": "d99208b91933fd2a58ed9ed321af07dacd06ddc3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "358d4f821c03add421a4c49290538a705852ccf1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a285395020780adac1ffbc844069c3d700bf007a",
              "versionType": "git"
            },
            {
              "lessThan": "6.6.112",
              "status": "affected",
              "version": "6.6.102",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.53",
              "status": "affected",
              "version": "6.12.42",
              "versionType": "semver"
            },
            {
              "lessThan": "6.16",
              "status": "affected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThan": "6.17",
              "status": "affected",
              "version": "6.16.1",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/index.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist\n\nIndex allocation requires at least one bit in the $BITMAP attribute to\ntrack usage of index entries. If the bitmap is empty while index blocks\nare already present, this reflects on-disk corruption.\n\nsyzbot triggered this condition using a malformed NTFS image. During a\nrename() operation involving a long filename (which spans multiple\nindex entries), the empty bitmap allowed the name to be added without\nvalid tracking. Subsequent deletion of the original entry failed with\n-ENOENT, due to unexpected index state.\n\nReject such cases by verifying that the bitmap is not empty when index\nblocks exist."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nfs/ntfs3: rechazar la asignaci\u00f3n de \u00edndice si $BITMAP est\u00e1 vac\u00edo pero existen bloques\n\nLa asignaci\u00f3n de \u00edndice requiere al menos un bit en el atributo $BITMAP para rastrear el uso de las entradas de \u00edndice. Si el mapa de bits est\u00e1 vac\u00edo mientras los bloques de \u00edndice ya est\u00e1n presentes, esto refleja corrupci\u00f3n en disco.\n\nsyzbot activ\u00f3 esta condici\u00f3n usando una imagen NTFS malformada. Durante una operaci\u00f3n rename() que involucraba un nombre de archivo largo (que abarca m\u00faltiples entradas de \u00edndice), el mapa de bits vac\u00edo permiti\u00f3 que el nombre fuera a\u00f1adido sin un seguimiento v\u00e1lido. La eliminaci\u00f3n posterior de la entrada original fall\u00f3 con -ENOENT, debido a un estado de \u00edndice inesperado.\n\nRechazar tales casos verificando que el mapa de bits no est\u00e9 vac\u00edo cuando existan bloques de \u00edndice."
    }
  ],
  "id": "CVE-2025-40067",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-10-28T12:15:41.167",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/039ddf353cc33f6546a87ec1ac3210637d714bec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0dc7117da8f92dd5fe077d712a756eccbe377d40"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/978aac54e93ea35aab20b32ae393d3d33964e7ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/be66551da203862c689c12e1d35ce87217c017c1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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