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CVE-2026-46570

Tuxera Ntfs-3g buffer overflow

8.1 HIGHEPSS 0.15%
  1. Published7 Oct 2026

Description

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_index_walk_down() in libntfs-3g/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 reading the special crafted file metadata.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Tuxera Ntfs-3g< 2026.7.7

Remediation

Fixed in
Tuxera Ntfs-3g≥ 2026.7.7

References

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Frequently asked

Is CVE-2026-46570 being actively exploited?

CVE-2026-46570 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.15%.

How severe is CVE-2026-46570?

CVE-2026-46570 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.15% probability of exploitation.

Which products are affected by CVE-2026-46570?

Affected products include Tuxera Ntfs-3g.

How do I fix CVE-2026-46570?

Upgrade affected software to a fixed version, for example Tuxera Ntfs-3g 2026.7.7 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-46570 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.