---
id: CVE-2026-42616
title: >-
  In NTFS-3G before 2026.7.7, a heap buffer overflow exists in cat() in
  ntfscat.c that allows an attacker to corrupt heap memory in the ntfscat binary
  by crafting a malicious NTFS image
summary: >-
  In NTFS-3G before 2026.7.7, a heap buffer overflow exists in cat() in
  ntfscat.c that allows an attacker to corrupt heap memory in the ntfscat binary
  by crafting a malicious NTFS image. The overflow is triggered by reading a
  file.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
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: '2026-10-08T19:09:18.877'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42616'
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-p6mp-gp2j-7358'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00166
epssPercentile: 0.05789
ingestedAt: '2026-10-07T14:33:21.952Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-19T17:04:50.398836Z'
---

## Overview

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in cat() in ntfscat.c that allows an attacker to corrupt heap memory in the ntfscat binary by crafting a malicious NTFS image. The overflow is triggered by reading a file.

## Affected

- `ntfs-3g < 2026.7.7`

## Remediation

Upgrade past the affected range:

- `ntfs-3g 2026.7.7`