8.4

CVE-2026-40706: tuxera ntfs-3g Heap-based Buffer Overflow

Awaiting analysis
AliasesALPINE-CVE-2026-40706MGASA-2026-0118SUSE-SU-2026:1571-1
Published 21-04-2026Last modified 22-04-2026

Vulnerability summary

CVE-2026-40706 is a high (CVSS 8.4) Heap-based Buffer Overflow vulnerability in tuxera ntfs-3g. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.4, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · -0.05 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 1 · Related 2
USN-8192-1USN-8192-2

Timeline

  1. 21-04-2026
    PublishedVulnerability first disclosed.
  2. 22-04-2026
    Last modifiedVulnerability information updated.

Description

In 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 corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered on the READ path (stat, readdir, open) when processing a security descriptor with multiple ACCESS_DENIED ACEs containing WRITE_OWNER from distinct group SIDs.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Decrease -0.05 pp

From 0.21% 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.

Suse4 products
  • ntfs-3g_ntfsprogs&distro=SUSE Linux Enterprise Module for Basesystem 15 SP7< 2022.5.17-150000.3.24.1
  • ntfs-3g_ntfsprogs&distro=SUSE Linux Enterprise Module for Development Tools 15 SP7< 2022.5.17-150000.3.24.1
  • ntfs-3g_ntfsprogs&distro=SUSE Linux Enterprise Server 15 SP6-LTSS< 2022.5.17-150000.3.24.1
  • ntfs-3g_ntfsprogs&distro=SUSE Linux Enterprise Server for SAP Applications 15 SP6< 2022.5.17-150000.3.24.1
Alpine1 product
  • ntfs-3g< 2026.2.25-r0
Debian1 product
  • ntfs-3g< 1:2022.10.3-1+deb12u3 | < 1:2022.10.3-5+deb13u1 | < 1:2026.2.25-1
Mageia1 product
  • ntfs-3g< 2022.10.3-1.2.mga9
Opensuse1 product
  • ntfs-3g_ntfsprogs&distro=openSUSE Tumbleweed< 2022.10.3-6.1
Tuxera1 product
Ubuntu1 product
  • ntfs-3gAll versions (No fix recorded) | < 1:2021.8.22-3ubuntu1.3 | < 1:2022.10.3-1.2ubuntu3.1 | < 1:2022.10.3-5ubuntu0.25.10.1 | < 1:2022.10.3-5ubuntu1

7 vendors · 10 products

References

19 links
Show all 19 references