High severity8.4NVD Advisory· Published Apr 21, 2026· Updated Apr 22, 2026
CVE-2026-40706
CVE-2026-40706
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.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
6- www.openwall.com/lists/oss-security/2026/04/21/4nvd
- github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.cnvd
- github.com/tuxera/ntfs-3g/releases/tag/2026.2.25nvd
- github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9nvd
- lists.debian.org/debian-lts-announce/2026/04/msg00024.htmlnvd
- www.openwall.com/lists/oss-security/2026/04/21/4nvd
News mentions
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