Skip to content
CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-64532

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

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • b46acd6a6a627d876898e1c84d3f84902264b445 to < b20e5a709d8bd190d6e4645606763c7423e694c1affected
  • b46acd6a6a627d876898e1c84d3f84902264b445 to < d41b382068ca4e64e421f736cdd700095464b6acaffected
  • b46acd6a6a627d876898e1c84d3f84902264b445 to < 429d653ca641d38a78609b8f62e81a0a5c780a2daffected
  • b46acd6a6a627d876898e1c84d3f84902264b445 to < 315d3a9a48b49f889da3d858a9307e677cb9e1bdaffected
  • b46acd6a6a627d876898e1c84d3f84902264b445 to < be306b8d9143a9c076c804a7ca025d69caf9c448affected
  • b46acd6a6a627d876898e1c84d3f84902264b445 to < 36feda687afebae24c472202694448738809c411affected
  • b46acd6a6a627d876898e1c84d3f84902264b445 to < 3e127829e57f5190f612412ece4541cb96d5ec7aaffected

Linux Linux

Default version status: affected

  • 5.15affected
  • 0 to < 5.15unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References