VDB
CVE-2026-40706
CVE-2026-40706
PUBLISHED
CVSS 8.399999618530273 HIGH
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.
EPSS 0.02% · 4.8th percentile
Risk Scores
CVSS v3.1
8.399999618530273
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.02%
4.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tuxera | NTFS-3G | 2022.10.3 |
| tuxera | ntfs-3g | 2022.10.3 |
Timeline
- Apr 21, 2026 CVE Published
- Apr 21, 2026 PoC Published
- Apr 22, 2026 CVE Updated
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score
References
- https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027 url
- https://www.openwall.com/lists/oss-security/2026/04/21/4 url
- https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9 url
- https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25 url
- https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html url
- http://www.openwall.com/lists/oss-security/2026/04/21/4 url