CVE-2026-40706
HIGH8.4EPSS 0.02%Published: 4/21/2026Modified: 4/29/2026
Also known as:ALPINE-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 packages (2)
- Alpine/ntfs-3gfrom 0, < 2026.2.25-r0
- Debian/ntfs-3gfrom 0, < 1:2017.3.23AR.3-4+deb11u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |