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

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-07-30 06:00
VLAI
Title
fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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)
Affected: 6.6.102 , < 6.6.112 (semver)
Affected: 6.12.42 , < 6.12.53 (semver)
Affected: 6.15.10 , < 6.16 (semver)
Affected: 6.16.1 , < 6.17 (semver)
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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)
Create a notification for this product.
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{
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        "shortName": "Linux"
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    "dateReserved": "2025-04-16T07:20:57.159Z",
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:16:06+00:00",
      "cve": "CVE-2025-40067",
      "id": "CVE-2025-40067",
      "initial_release_date": "2025-10-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40067.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-26T16:42:39Z",
      "cve": "CVE-2025-40067",
      "id": "CVE-2025-40067",
      "initial_release_date": "2025-10-30T00:24:40Z",
      "product_status:known_not_affected": "407",
      "product_status:recommended": "6",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40067",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40067.json",
      "version": "8"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.