CVE-2026-40706_CVE-2026-40706

8.4 / 10

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Basic Information

ID CVE-2026-40706

Source mitre

Published Apr 21, 2026 at 00:00

Modified Apr 21, 2026 at 21:20

Affected Product

Vendor Tuxera

Product NTFS-3G

Version 2022.10.3

Affected Versions Tuxera NTFS-3G 2022.10.3

CWE Classification

CWE-122

References

{
    "lastseen": "",
    "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.",
    "published": "2026-04-21T00:00:00.000Z",
    "modified": "2026-04-21T21:20:00.477Z",
    "type": "cve",
    "title": "CVE-2026-40706",
    "source": "mitre",
    "references": "https://github.com/tuxera/ntfs-3g/blob/d3ace19838ce37cfde55294e76841e6d2f393f9e/libntfs-3g/acls.c#L4011-L4027\nhttps://www.openwall.com/lists/oss-security/2026/04/21/4\nhttps://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9\nhttps://github.com/tuxera/ntfs-3g/releases/tag/2026.2.25",
    "id": "CVE-2026-40706",
    "bulletinFamily": "",
    "cwe": [
        "CWE-122"
    ],
    "cvelist": null,
    "sourceData": "Tuxera NTFS-3G 2022.10.3",
    "sourceHref": "",
    "cvss": {
        "score": 8.4,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "NTFS-3G",
    "version": "2022.10.3",
    "vendor": "Tuxera",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}