In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}

In do_action()'s UpdateRecordDataRoot (fslog.c:3489) and
UpdateRecordDataAllocation (fslog.c:3697) cases, the memmove
destination is `Add2Ptr(e, le16_to_cpu(e->view.data_off))`,
where e->view.data_off comes from an on-disk NTFS_DE inside
an INDEX_ROOT or INDEX_BUFFER. Neither case validates
view.data_off + dlen against e->size; the existing
check_if_index_root / check_if_alloc_index helpers walk the
entry chain and validate the entry's offset, but not its
internal view fields.

The neighbouring read sites (e.g., fs/ntfs3/index.c when
iterating view entries) check view.data_off + view.data_size
<= e->size. Apply the same bound at the two memmove sites.

Reproduced under UML+KASAN on mainline 8d90b09e6741 via
pr_warn-only probe instrumentation: with view.data_off forced
to 0xFFFC, the memmove writes 32 bytes past the end of the
NTFS_DE.

This is similar in shape to Pavitra Jha's 2026-05-02 patch
"fs/ntfs3: prevent oob in case UpdateRecordDataRoot"
(<20260502105008.21827-1-jhapavitra98@gmail.com>) which
proposes calling ntfs3_bad_de_range(); that helper does not
exist in mainline. This patch uses inline checks.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
b46acd6a6a627d876898e1c84d3f84902264b445 affected < b20e5a709d8bd190d6e4645606763c7423e694c1
b46acd6a6a627d876898e1c84d3f84902264b445 affected < d41b382068ca4e64e421f736cdd700095464b6ac
b46acd6a6a627d876898e1c84d3f84902264b445 affected < 429d653ca641d38a78609b8f62e81a0a5c780a2d
b46acd6a6a627d876898e1c84d3f84902264b445 affected < 315d3a9a48b49f889da3d858a9307e677cb9e1bd
b46acd6a6a627d876898e1c84d3f84902264b445 affected < be306b8d9143a9c076c804a7ca025d69caf9c448
b46acd6a6a627d876898e1c84d3f84902264b445 affected < 36feda687afebae24c472202694448738809c411
b46acd6a6a627d876898e1c84d3f84902264b445 affected < 3e127829e57f5190f612412ece4541cb96d5ec7a
Linux Linux affected
Version Status Constraints
5.15 affected —
0 unaffected < 5.15
5.15.212 unaffected ≤ 5.15.*
6.1.178 unaffected ≤ 6.1.*
6.6.145 unaffected ≤ 6.6.*
6.12.97 unaffected ≤ 6.12.*
6.18.40 unaffected ≤ 6.18.*
7.1.5 unaffected ≤ 7.1.*
7.2-rc1 unaffected ≤ *

No data.

No data.

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References
Link Providers
https://git.kernel.org/stable/c/315d3a9a48b49f889da3d858a9307e677cb9e1bd cve-icon
https://git.kernel.org/stable/c/36feda687afebae24c472202694448738809c411 cve-icon
https://git.kernel.org/stable/c/3e127829e57f5190f612412ece4541cb96d5ec7a cve-icon
https://git.kernel.org/stable/c/429d653ca641d38a78609b8f62e81a0a5c780a2d cve-icon
https://git.kernel.org/stable/c/b20e5a709d8bd190d6e4645606763c7423e694c1 cve-icon
https://git.kernel.org/stable/c/be306b8d9143a9c076c804a7ca025d69caf9c448 cve-icon
https://git.kernel.org/stable/c/d41b382068ca4e64e421f736cdd700095464b6ac cve-icon
History

Mon, 27 Jul 2026 07:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation} In do_action()'s UpdateRecordDataRoot (fslog.c:3489) and UpdateRecordDataAllocation (fslog.c:3697) cases, the memmove destination is `Add2Ptr(e, le16_to_cpu(e->view.data_off))`, where e->view.data_off comes from an on-disk NTFS_DE inside an INDEX_ROOT or INDEX_BUFFER. Neither case validates view.data_off + dlen against e->size; the existing check_if_index_root / check_if_alloc_index helpers walk the entry chain and validate the entry's offset, but not its internal view fields. The neighbouring read sites (e.g., fs/ntfs3/index.c when iterating view entries) check view.data_off + view.data_size <= e->size. Apply the same bound at the two memmove sites. Reproduced under UML+KASAN on mainline 8d90b09e6741 via pr_warn-only probe instrumentation: with view.data_off forced to 0xFFFC, the memmove writes 32 bytes past the end of the NTFS_DE. This is similar in shape to Pavitra Jha's 2026-05-02 patch "fs/ntfs3: prevent oob in case UpdateRecordDataRoot" (<20260502105008.21827-1-jhapavitra98@gmail.com>) which proposes calling ntfs3_bad_de_range(); that helper does not exist in mainline. This patch uses inline checks.
Title fs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-27T06:32:33.159Z

Reserved: 2026-07-19T15:36:31.794Z

Link: CVE-2026-64532

cve-icon Vulnrichment

No data.

cve-icon NVD

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cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-27T08:30:11Z

Weaknesses

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