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CVE-2026-40706

Quick assessment

Affected
Tuxera NTFS-3G
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tuxera NTFS-3G是芬兰Tuxera公司的一套开源的、跨平台的用于支持NTFS分区读写的驱动程序。 Tuxera NTFS-3G 2022.10.3版本至2026.2.25之前版本存在安全漏洞，该漏洞源于ntfs_build_permissions_posix函数存在堆缓冲区溢出，可能导致处理恶意NTFS镜像时损坏堆内存。

CVSS 8.4 · High EPSS 0.17% · P6
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I. Basic Information for CVE-2026-40706

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Tuxera NTFS-3G 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tuxera NTFS-3G是芬兰Tuxera公司的一套开源的、跨平台的用于支持NTFS分区读写的驱动程序。 Tuxera NTFS-3G 2022.10.3版本至2026.2.25之前版本存在安全漏洞，该漏洞源于ntfs_build_permissions_posix函数存在堆缓冲区溢出，可能导致处理恶意NTFS镜像时损坏堆内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tuxera NTFS-3G 2022.10.3 ~ 2026.2.25 -

II. Public POCs for CVE-2026-40706

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III. Intelligence Information for CVE-2026-40706

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Patches & Fixes for CVE-2026-40706 (1)

Vendor Advisories for CVE-2026-40706 (1)

Mailing List Discussions for CVE-2026-40706 (1)

IV. Related Vulnerabilities

Same product: NTFS-3G
Same weakness: CWE-122

V. Comments for CVE-2026-40706

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