# CVE-2026-64532: linux: In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: bound NTFS_DE view.data_off in UpdateR...

CVE-2026-64532 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-64532, released August 1, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-64532
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 27, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | bpftool-debuginfo amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | bpftool6.12 amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | bpftool6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | bpftool6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-debuginfo amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-devel amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-headers amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-livepatch-6.1.180-225.360 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-livepatch-6.12.100-125.179 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel-livepatch-6.18.41-94.142 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel-modules-extra amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-modules-extra-common amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-tools amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-tools-debuginfo amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel-tools-devel amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | kernel6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-debuginfo-common-aarch64 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-debuginfo-common-x86_64 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-devel amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-headers amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-modules-extra amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-modules-extra-common amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-tools amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-tools-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | kernel6.18-tools-devel amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-64532](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64532.md) | Aug 1, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.100-1 | [DEBIAN-CVE-2026-64532](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64532.md) | Aug 1, 2026 |
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-64532](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64532.md) | Aug 1, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.100-1~deb12u1 | [DEBIAN-CVE-2026-64532](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64532.md) | Aug 1, 2026 |
| Linux | microvm-kernel6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | perf amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | perf-debuginfo amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | perf6.12 amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | perf6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | perf6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | python3-perf amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | python3-perf-debuginfo amzn 2023 | 1:6.1.180-225.360.amzn2023 | [ALAS2023-2026-2058](https://patchblox.com/security/data/fix/linux/alas2023-2026-2058.md) | Aug 17, 2026 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.100-125.179.amzn2023 | [ALAS2023-2026-2057](https://patchblox.com/security/data/fix/linux/alas2023-2026-2057.md) | Aug 17, 2026 |
| Linux | python3-perf6.18 amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |
| Linux | python3-perf6.18-debuginfo amzn 2023 | 1:6.18.41-94.142.amzn2023 | [ALAS2023-2026-2071](https://patchblox.com/security/data/fix/linux/alas2023-2026-2071.md) | Aug 31, 2026 |

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