CVE-2026-40706
Fixed in a distro release EPSS <1%CVSS 8.4
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.
Products: tuxera ntfs-3g
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.20 | ntfs-3g | 2026.2.25-r0 |
| Alpine 3.21 | ntfs-3g | 2026.2.25-r0 |
| Alpine 3.22 | ntfs-3g | 2026.2.25-r0 |
| Alpine 3.23 | ntfs-3g | 2026.2.25-r0 |
| Alpine 3.24 | ntfs-3g | 2026.2.25-r0 |
| Debian 12 | ntfs-3g | 1:2022.10.3-1+deb12u3 |
| Debian 13 | ntfs-3g | 1:2022.10.3-5+deb13u1 |
| Debian 14 | ntfs-3g | 1:2026.2.25-1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | ntfs-3g_ntfsprogs | 2022.5.17-150000.3.24.1 |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | ntfs-3g_ntfsprogs | 2022.5.17-150000.3.24.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | ntfs-3g_ntfsprogs | 2022.5.17-150000.3.24.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | ntfs-3g_ntfsprogs | 2022.5.17-150000.3.24.1 |
| Ubuntu 18.04 LTS | ntfs-3g | no fix |
| Ubuntu 20.04 LTS | ntfs-3g | no fix |
| Ubuntu 22.04 LTS | ntfs-3g | 1:2021.8.22-3ubuntu1.3 |
| Ubuntu 24.04 LTS | ntfs-3g | 1:2022.10.3-1.2ubuntu3.1 |
| Ubuntu 25.10 | ntfs-3g | 1:2022.10.3-5ubuntu0.25.10.1 |
| Ubuntu 26.04 LTS | ntfs-3g | 1:2022.10.3-5ubuntu1 |
| Ubuntu Pro 14.04 LTS | ntfs-3g | no fix |
| Ubuntu Pro 16.04 LTS | ntfs-3g | no fix |
| openSUSE Tumbleweed | ntfs-3g_ntfsprogs | 2022.10.3-6.1 |