CVE-2026-40706: 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…

PriorityP345high8.4CVSS 3.1

AVLACLPRNUINSUCHIHAH

EPSS

0.17%

6.1th percentile

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

1 ranges

Vendor	Product	Version range	Fixed in
tuxera	ntfs-3g	>= 2022.10.3 < 2026.2.25	2026.2.25

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