CVE-2026-40706 - Vulnerability Analysis
HighCVSS: 8.4Last Updated: April 21, 2026
NTFS-3G - Buffer Overflow
Overview
NTFS-3G > 2022.10.3 and < 2026.2.25 contains a heap buffer overflow caused by improper handling of multiple ACCESS_DENIED ACEs with WRITE_OWNER from distinct group SIDs in ntfs_build_permissions_posix(), letting attackers corrupt heap memory via crafted NTFS images, exploit requires crafted malicious NTFS image.
Severity & Score
Impact
Attackers can corrupt heap memory in the SUID-root ntfs-3g binary, potentially leading to privilege escalation or code execution.
Mitigation
Update to version 2026.2.25 or later.
References
- https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027
- https://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25
- https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9
- https://www.openwall.com/lists/oss-security/2026/04/21/4
- http://www.openwall.com/lists/oss-security/2026/04/21/4
- https://lists.debian.org/debian-lts-announce/2026/04/msg00024.html
Social Media Activity(2 posts)
š CVE-2026-40706 - High (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 tri... š https://www.thehackerwire.com/vulnerability/CVE-2026-40706/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack
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š CVE-2026-40706 - High (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 tri... š https://www.thehackerwire.com/vulnerability/CVE-2026-40706/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack
View original postRelated Resources
Details
- CVE ID
- CVE-2026-40706
- Severity
- High
- CVSS Score
- 8.4
- Type
- buffer_overflow
- Status
- new
- EPSS
- 0.0%
- Social Posts
- 2
CWE
- CWE-122
CVSS Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H