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

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-05-23 16:01
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
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)
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)
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}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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