CVE-2026-40706

HIGH EPSS 6.1%
Published Apr 21, 20262mo ago · Modified Jun 17, 20262w ago
8.4 CVSS 3.1
High
Find Similar
Published Apr 21, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.4
Exploitability
2.5
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
6.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-122

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2026/04/21/4
  • github.com 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
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html
  • openwall.com https://www.openwall.com/lists/oss-security/2026/04/21/4

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.