---
id: CVE-2026-42617
title: >-
  In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ir_to_ib()
  in 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_ir_to_ib()
  in 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 exten…
severity: none
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T14:47:21.140'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-42617'
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-jv65-qqf7-f692'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-07T14:33:21.953Z'
---

## Overview

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ir_to_ib() in 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.