CVE-2025-40067 (GCVE-0-2025-40067)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2025-12-01 06:17
VLAI?
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b35a50d639ca5259466ef5fea85529bb4fb17d5b , < 978aac54e93ea35aab20b32ae393d3d33964e7ae (git)
Affected: 3ed2cc6a6e93fbeb8c0cafce1e7fb1f64a331dcc , < be66551da203862c689c12e1d35ce87217c017c1 (git)
Affected: d99208b91933fd2a58ed9ed321af07dacd06ddc3 , < 039ddf353cc33f6546a87ec1ac3210637d714bec (git)
Affected: d99208b91933fd2a58ed9ed321af07dacd06ddc3 , < 0dc7117da8f92dd5fe077d712a756eccbe377d40 (git)
Affected: 358d4f821c03add421a4c49290538a705852ccf1 (git)
Affected: a285395020780adac1ffbc844069c3d700bf007a (git)
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    Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.6.112 , ≤ 6.6.* (semver)
Unaffected: 6.12.53 , ≤ 6.12.* (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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        {
          "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."
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      "providerMetadata": {
        "dateUpdated": "2025-12-01T06:17:18.363Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/0dc7117da8f92dd5fe077d712a756eccbe377d40"
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      ],
      "title": "fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40067",
    "datePublished": "2025-10-28T11:48:37.034Z",
    "dateReserved": "2025-04-16T07:20:57.159Z",
    "dateUpdated": "2025-12-01T06:17:18.363Z",
    "state": "PUBLISHED"
  },
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  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.