---
id: CVE-2026-46569
title: >-
  In NTFS-3G before 2026.7.7, a heap buffer overflow exists in
  ntfs_ib_copy_tail(), 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_ib_copy_tail(), 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 t…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-787
  - CWE-122
vendor: tuxera
product: ntfs-3g
affected:
  - ntfs-3g < 2026.7.7
patched:
  - ntfs-3g 2026.7.7
published: '2026-10-07'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T14:17:21.277'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46569'
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-xxv8-9r24-hcj9'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.0016
epssPercentile: 0.05149
ingestedAt: '2026-10-07T14:33:21.956Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-09T01:57:30.429039Z'
---

## Overview

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ib_copy_tail(), 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 extending a directory, e.g., by creating a file.

## Affected

- `ntfs-3g < 2026.7.7`

## Remediation

Upgrade past the affected range:

- `ntfs-3g 2026.7.7`