---
id: CVE-2026-56136
title: >-
  In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill()
  in libntfs-3g/index.c that allows an attacker to read possibly confidential
  information in an ntfs-3g process by crafting a malicious NTFS image
summary: >-
  In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill()
  in libntfs-3g/index.c that allows an attacker to read possibly confidential
  information in an ntfs-3g process by crafting a malicious NTFS image. This
  read oper…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-125
published: '2026-08-24'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T16:03:22.897'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56136'
references:
  - url: 'https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-r66g-c39x-cw95'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.00091
epssPercentile: 0.00547
ingestedAt: '2026-09-09T16:14:05.515Z'
---

## Overview

In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill() in libntfs-3g/index.c that allows an attacker to read possibly confidential information in an ntfs-3g process by crafting a malicious NTFS image. This read operation is triggered by creation of a file with a crafted name.

## Remediation

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