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CVE-2026-42617

7.1 · HIGH

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 i…

Published Oct 7, 2026tuxeraCWE-122EPSS 0.15%

Overview

CVE-2026-42617 is a high-severity vulnerability affecting tuxera ntfs-3g. It was published on October 7, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

Check the references section for vendor advisories and patches from tuxera. Update ntfs-3g to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
tuxerantfs-3g>= 0, < 2026.7.7Affected

References

GitHubgithub.com/tuxera/ntfs-3g/releases#release-2026.7.7GitHubgithub.com/tuxera/ntfs-3g/security/advisories/GHSA-jv65-qqf7-f692

How CyberStrike helps

Frequently asked questions

What is CVE-2026-42617?

CVE-2026-42617 is a high-severity vulnerability affecting tuxera ntfs-3g. It was published on October 7, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-42617?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-42617?

Check the references section for vendor advisories and patches from tuxera. Update ntfs-3g to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-42617?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-42617 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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