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CVE-2026-99101ntfs: move attribute payload before shrinking its record

Description

In the Linux kernel, the following vulnerability has been resolved: ntfs: move attribute payload before shrinking its record ntfs_new_attr_flags() resizes the non-resident attribute record before moving its name and mapping pairs to their shorter-header offsets when compression or sparse state is cleared. Shrinking the record first moves the following attribute over the tail of the old record. The subsequent memmove() therefore copies bytes from that following attribute instead of the old mapping pairs. Re-enabling compression on an empty file persists those bytes as a malformed mapping pairs array, which ntfsck reports as a missing or invalid run length. Move the payload before shrinking the record, while retaining the existing resize-before-move ordering when growing it.

Timeline

  1. ID reserved

    By Linux

  2. · 33 days later

    Published

  3. · 4 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.16% · top 95% of all CVEs (14 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 47503f989736d6c4c9f8bfca1c28d267473ccd4b – < 7dc2c524608039d1b082a0087f7aa0751edd4ffb
    • affected 47503f989736d6c4c9f8bfca1c28d267473ccd4b – < 0ab6dc1ac4601c8d79e5448a024daed6b0c5ef64

  • Linux · Linux

    • affected 7.1
    • unaffected < 7.1
    • unaffected 7.2.13 – ≤ 7.2.*
    • unaffected 7.3 – ≤ *

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .