---
id: CVE-2026-46570
title: >-
  In NTFS-3G before 2026.7.7, a heap buffer overflow exists in
  ntfs_index_walk_down() in libntfs-3g/index.c that allows an attacker to
  corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious
  NTFS image
summary: >-
  In NTFS-3G before 2026.7.7, a heap buffer overflow exists in
  ntfs_index_walk_down() in libntfs-3g/index.c that allows an attacker to
  corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious
  NTFS image. The overflow is …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: tuxera
product: ntfs-3g
affected:
  - ntfs-3g < 2026.7.7
patched:
  - ntfs-3g 2026.7.7
published: '2026-10-07'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T19:08:16.037'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46570'
references:
  - url: 'https://github.com/tuxera/ntfs-3g/releases#release-2026.7.7'
    label: cve@mitre.org
  - url: 'https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-m6qq-pv5j-2wxc'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00152
epssPercentile: 0.04309
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-07T16:25:27.641833Z'
ingestedAt: '2026-10-07T14:33:21.962Z'
---

## Overview

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_index_walk_down() in libntfs-3g/index.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by reading the special crafted file metadata.

## Affected

- `ntfs-3g < 2026.7.7`

## Remediation

Upgrade past the affected range:

- `ntfs-3g 2026.7.7`