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CVE-2026-56136· NVD / CVE Program· CNA mitre

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

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: azl3 ntfs-3g 2022.10.3-4 on Azure Linux 3.0 2022.10.3-4.

Low priority for now. Upgrade to azl3 ntfs-3g 2022.10.3-4 on Azure Linux 3.0 2022.10.3-4 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 4.7 · v3.1—No exploit Fix available
Published
Aug 24, 2026
Updated
Oct 14, 2026
EPSS
0.1% · 1th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
tuxerantfs-3g

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • tuxera ntfs-3gbefore 2026.7.7

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12ntfs-3gall versions—
Debian:13ntfs-3gbefore 1:2022.10.3-5+deb13u21:2022.10.3-5+deb13u2
Debian:14ntfs-3gbefore 1:2026.7.7-21:2026.7.7-2
openSUSE:Leap 16.0ntfs-3g_ntfsprogsbefore 2022.10.3-160000.4.12022.10.3-160000.4.1
openSUSE:Tumbleweedntfs-3g_ntfsprogsbefore 2022.10.3-8.12022.10.3-8.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7ntfs-3g_ntfsprogsbefore 2022.5.17-150000.3.27.12022.5.17-150000.3.27.1
SUSE:Linux Enterprise Server 12 SP5-LTSSntfs-3g_ntfsprogsbefore 2022.5.17-5.23.12022.5.17-5.23.1

Same product

tuxera: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-40706In NTFS-3G 2022.10.3 before 2026.2.25, a heap buffer overflow exists in ntfs_build_permissions_posix() in acls.c that allows an attacker to
    33Monitor
  • CVE-2026-46570In 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
    32Monitor
  • CVE-2017-0358ntfs-3g: Modprobe influence vulnerability via environment variables
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-40284Nov 6, 2022 · A buffer overflow was discovered in NTFS-3G before 2022.10.3.
    31Monitor
  • ← EarlierCVE-2026-56135Aug 24, 2026 · In NTFS-3G through 2026.2.25, a heap-based buffer overflow exists in the function build_inherited_id() in libntfs-3g/security.c that allows
    29Monitor
  • Later →CVE-2026-42616Oct 7, 2026 · 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 ntfsca
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 ntfs-3g 2022.10.3-4 on Azure Linux 3.02022.10.3-4Microsoft (MSRC)
debian:ntfs-3g1:2022.10.3-5+deb13u2 · Debian:13Package registry (OSV)
opensuse:ntfs-3g_ntfsprogs2022.10.3-8.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:ntfs-3g_ntfsprogs2022.5.17-5.23.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-4657144 days apartIn NTFS-3G before 2026.7.7, a out-of-bounds read exists in ntfs_fix_file_name() in libntfs-3g/reparse.c that allows an attacker to read poss
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records