---
title: "CVE-2026-46570: NTFS-3G - Buffer Overflow"
description: "NTFS-3G < 2026.7.7 contains a heap buffer overflow caused by improper handling in ntfs_index_walk_down() in libntfs-3g/index.c, letting attackers corrupt heap memory via crafted NTFS image, exploit requires crafted file metadata."
url: https://panop.io/threat-heartbeat/CVE-2026-46570/
---

# CVE-2026-46570 NTFS-3G - Buffer Overflow

NTFS-3G < 2026.7.7 contains a heap buffer overflow caused by improper handling in ntfs\_index\_walk\_down() in libntfs-3g/index.c, letting attackers corrupt heap memory via crafted NTFS image, exploit requires crafted file metadata.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.15% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-46570)

## Details

Type

Buffer Overflow

Impact

Privilege Escalation

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to version 2026.7.7 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-46570](https://nvd.nist.gov/vuln/detail/CVE-2026-46570)
- [https://github.com/tuxera/ntfs-3g/releases#release-2026.7.7](https://github.com/tuxera/ntfs-3g/releases#release-2026.7.7)
- [https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-m6qq-pv5j-2wxc](https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-m6qq-pv5j-2wxc)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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