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Fencer Vulns
medium 4.7

CVE-2026-56136 json

In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill() in libntfs-3g/index.c that allows an attacker to read possibly…

published 2026-08-24 2 mo ago modified 2026-10-14 25 d ago also EUVD-2026-65148

cvss
4.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

In NTFS-3G through 2026.2.25, an out-of-bounds read exists in ntfs_ir_nill() in libntfs-3g/index.c that allows an attacker to read possibly confidential information in an ntfs-3g process by crafting a malicious NTFS image. This read operation is triggered by creation of a file with a crafted name.

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-2026-56136

  • 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-2026-56136

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 2022.10.3-4

azure linux advisories AZL-97929

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-2026-56136 updated cvss 3.3

ntfs-3g: NTFS-3G: Information disclosure due to out-of-bounds read

  • 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
partial
Assessed
2 mo ago

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA 3.1 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

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.