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.
References
Configurations
Configuration 1 (hide)
|
History
12 Nov 2026, 21:48
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/315d3a9a48b49f889da3d858a9307e677cb9e1bd - Patch | |
| References | () https://git.kernel.org/stable/c/36feda687afebae24c472202694448738809c411 - Patch | |
| References | () https://git.kernel.org/stable/c/3e127829e57f5190f612412ece4541cb96d5ec7a - Patch | |
| References | () https://git.kernel.org/stable/c/429d653ca641d38a78609b8f62e81a0a5c780a2d - Patch | |
| References | () https://git.kernel.org/stable/c/b20e5a709d8bd190d6e4645606763c7423e694c1 - Patch | |
| References | () https://git.kernel.org/stable/c/be306b8d9143a9c076c804a7ca025d69caf9c448 - Patch | |
| References | () https://git.kernel.org/stable/c/d41b382068ca4e64e421f736cdd700095464b6ac - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
19 Oct 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-787 |
Information
Published : 2026-07-27 08:16
Updated : 2026-11-12 21:48
NVD link : CVE-2026-64532
Mitre link : CVE-2026-64532
CVE.ORG link : CVE-2026-64532
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-787
Out-of-bounds Write