Is CVE-2026-56136 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-56136 being exploited in the wild.

How severe is CVE-2026-56136?

Medium severity, with a CVSS score of 4.7, published 24 August 2026.

Which products and versions are affected?

Tuxera NTFS-3G through 2026.2.25.

Is there a fix for CVE-2026-56136?

A patch was published on 2026-07-07: Version 2026.7.7 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-56136 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-56136?

Check whether you run Tuxera NTFS-3G at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-56136: NTFS-3G out-of-bounds read in ntfs_ir_nill()

CVE-2026-56136 · Severity: medium · CVSS 4.7 · Published 2026-08-24

NTFS-3G is an open-source driver that enables Linux systems to read and write NTFS filesystems (commonly found on Windows drives). An attacker can craft a malicious NTFS disk image that, when mounted or accessed by NTFS-3G, triggers an out-of-bounds memory read. This allows the attacker to read sensitive information from the NTFS-3G process, such as encryption keys or other confidential data in memory.

Technologies: Tuxera NTFS-3G. Vendors: Tuxera.

Quick answers

Is CVE-2026-56136 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-56136 being exploited in the wild.
How severe is CVE-2026-56136?: Medium severity, with a CVSS score of 4.7, published 24 August 2026.
Which products and versions are affected?: Tuxera NTFS-3G through 2026.2.25.
Is there a fix for CVE-2026-56136?: A patch was published on 2026-07-07: Version 2026.7.7 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-56136 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-56136?: Check whether you run Tuxera NTFS-3G at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This vulnerability is an out-of-bounds read in the ntfs_ir_nill() function within libntfs-3g/index.c. The flaw is triggered when NTFS-3G processes a file with a specially crafted name on a malicious NTFS disk image. The vulnerability requires local access and a user to mount or interact with the malicious filesystem. An attacker can read arbitrary data from the NTFS-3G process memory without authentication. The issue has been patched in version 2026.7.7, with backports available for earlier versions including 2022.10.3.

Affected products

Tuxera NTFS-3G through 2026.2.25

Timeline

2026-07-15: disclosed
2026-07-07: patched: Version 2026.7.7 released

References

https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-r66g-c39x-cw95

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.