CVE-2026-42617: Buffer Overflow

Published Oct 7, 2026
·
Updated

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfsirtoib() 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.

Affected Software

5 affected componentsFixes available
tuxera NTFS-3G<2026.7.7
debian/ntfs-3g<1:2022.10.3-1+deb12u4
1:2022.10.3-1+deb12u4
debian/ntfs-3g<1:2022.10.3-5+deb13u2
1:2022.10.3-5+deb13u2
debian/ntfs-3g<1:2026.7.7-2
1:2026.7.7-2
debian/ntfs-3g<=1:2022.10.3-1+deb12u3
1:2022.10.3-1+deb12u41:2022.10.3-5+deb13u21:2022.10.3-5+deb13u31:2026.9.28-2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/ntfs-3g to a version that resolves this vulnerability.

    Fixed in 1:2022.10.3-1+deb12u4
  2. Upgrade

    Upgrade debian/ntfs-3g to a version that resolves this vulnerability.

    Fixed in 1:2022.10.3-5+deb13u2
  3. Upgrade

    Upgrade debian/ntfs-3g to a version that resolves this vulnerability.

    Fixed in 1:2026.7.7-2
  4. Upgrade

    Upgrade debian/ntfs-3g to a version that resolves this vulnerability.

    Fixed in 1:2022.10.3-1+deb12u4Fixed in 1:2022.10.3-5+deb13u2Fixed in 1:2022.10.3-5+deb13u3Fixed in 1:2026.9.28-2
  5. Upgrade

    Upgrade NTFS-3G to a version that resolves this vulnerability.

    Fixed in 2026.7.7

Event History

Oct 7, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·02:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·02:17 PM
DescriptionSeverityAffected Software
Oct 10, 2026
Data Sourced
via Microsoft·08:06 AM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2026-42617?

The severity of CVE-2026-42617 is rated as 5.

2

What is CVE-2026-42617 related to?

CVE-2026-42617 is related to vulnerabilities in the ntfs-3g software package on Debian.

3

How do I fix CVE-2026-42617?

To fix CVE-2026-42617, it is recommended to update the ntfs-3g package to the latest version provided by the Debian maintainers.

4

When was CVE-2026-42617 last updated?

CVE-2026-42617 was last updated on 16 July 2026.

5

What systems are affected by CVE-2026-42617?

CVE-2026-42617 specifically affects systems running the ntfs-3g software package on Debian.

Company

Resources

Contact

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