CVEvulnerability
CVE-2026-40706
8.4 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-04-21
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.4 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-122
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.
Related
Weakness · CWE (1)
- CWE-122 Heap-based Buffer Overflow weakness
References
- https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027 github.com
- https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25 github.com
- https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9 github.com
- https://www.openwall.com/lists/oss-security/2026/04/21/4 www.openwall.com
- http://www.openwall.com/lists/oss-security/2026/04/21/4 www.openwall.com
- https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html lists.debian.org