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Fencer Vulns
high 7.8

CVE-2026-42616 json

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in cat() in ntfscat.c that allows an attacker to corrupt heap memory in the ntfsc…

published 2026-10-07 33 d ago modified 2026-10-19 20 d ago also EUVD-2026-94356

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

In NTFS-3G before 2026.7.7, a heap buffer overflow exists in cat() in ntfscat.c that allows an attacker to corrupt heap memory in the ntfscat binary by crafting a malicious NTFS image. The overflow is triggered by reading a file.

Patch / fix

  • tuxera ntfs-3g 2026.7.7
  • ntfs-3g Debian 12 1:2022.10.3-1+deb12u4
  • ntfs-3g Debian 13 1:2022.10.3-5+deb13u2
  • ntfs-3g Debian 14 1:2026.7.7-2

debian advisories DEBIAN-CVE-2026-42616

  • ntfs-3g Ubuntu 22.04 LTS 1:2021.8.22-3ubuntu1.4
  • ntfs-3g Ubuntu 24.04 LTS 1:2022.10.3-1.2ubuntu3.2
  • ntfs-3g Ubuntu 26.04 LTS 1:2022.10.3-5ubuntu1.1

ubuntu advisories UBUNTU-CVE-2026-42616

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ntfs-3g_ntfsprogs SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 2022.5.17-150000.3.27.1
  • ntfs-3g_ntfsprogs SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2022.5.17-5.23.1

suse advisories SUSE-SU-2026:3214-1SUSE-SU-2026:3213-1

  • ntfs-3g_ntfsprogs openSUSE Leap 16.0 2022.10.3-160000.4.1
  • ntfs-3g_ntfsprogs openSUSE Tumbleweed 2022.10.3-8.1

opensuse advisories openSUSE-SU-2026:21484-1openSUSE-SU-2026:11320-1

  • ntfs-3g Azure Linux 3.0 2022.10.3-5

azure linux advisories AZL-106863

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-42616 updated cvss 7.8

ntfs-3g: ntfs-3g: Privilege escalation via heap-based buffer overflow in cat()

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 d ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.