7.4

CVE-2026-56135: tuxera ntfs-3g Heap-based Buffer Overflow

Analyzed
AliasesUBUNTU-CVE-2026-56135DEBIAN-CVE-2026-56135
Published 24-08-2026Last modified 28-08-2026

Vulnerability summary

CVE-2026-56135 is a high (CVSS 7.4) Heap-based Buffer Overflow vulnerability in tuxera ntfs-3g. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.4, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 5
MGASA-2026-0424OPENSUSE-SU-2026:11320-1OPENSUSE-SU-2026:21484-1SUSE-SU-2026:3213-1SUSE-SU-2026:3214-1USN-8554-1

Timeline

  1. 24-08-2026
    PublishedVulnerability first disclosed.
  2. 28-08-2026
    Last modifiedVulnerability information updated.

Description

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 an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by creating a file in a crafted directory.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.14% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • ntfs-3gAll versions (No fix recorded) | < 1:2022.10.3-5+deb13u2 | < 1:2026.7.7-2
Tuxera1 product
Ubuntu1 product
  • ntfs-3gAll versions (No fix recorded) | < 1:2021.8.22-3ubuntu1.4 | < 1:2022.10.3-1.2ubuntu3.2 | < 1:2022.10.3-5ubuntu1.1

3 vendors · 3 products

References

6 links