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.

INFO

Published Date :

2026-04-21T00:00:00.000Z

Last Modified :

2026-04-22T15:35:30.245Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40706 vulnerability.

Vendors Products
Tuxera
  • Ntfs-3g
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40706.

URL Resource
http://www.openwall.com/lists/oss-security/2026/04/21/4 cve-icon
https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027 cve-icon cve-icon
https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25 cve-icon cve-icon
https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html cve-icon
https://www.openwall.com/lists/oss-security/2026/04/21/4 cve-icon cve-icon
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