FKIE_CVE-2025-40067

Vulnerability from fkie_nvd - Published: 2025-10-28 12:15 - Updated: 2026-06-17 09:21
Severity
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."
    }
  ],
  "id": "CVE-2025-40067",
  "lastModified": "2026-06-17T09:21:12.567",
  "metrics": {},
  "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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