ubuntu-cve-2026-40706
Vulnerability from osv_ubuntu
Published
2026-04-21 12:00
Modified
2026-05-20 15:27
Summary
Details
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.
Severity
8.4 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ntfs-3g",
"binary_version": "1:2013.1.13AR.1-2ubuntu2+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2013.1.13AR.1-2ubuntu2+esm4?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2013.1.13AR.1-2ubuntu1",
"1:2013.1.13AR.1-2ubuntu2",
"1:2013.1.13AR.1-2ubuntu2+esm1",
"1:2013.1.13AR.1-2ubuntu2+esm2",
"1:2013.1.13AR.1-2ubuntu2+esm3",
"1:2013.1.13AR.1-2ubuntu2+esm4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ntfs-3g",
"binary_version": "1:2015.3.14AR.1-1ubuntu0.3+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2015.3.14AR.1-1ubuntu0.3+esm4?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2014.2.15AR.3-3",
"1:2015.3.14AR.1-1",
"1:2015.3.14AR.1-1build1",
"1:2015.3.14AR.1-1ubuntu0.1",
"1:2015.3.14AR.1-1ubuntu0.2",
"1:2015.3.14AR.1-1ubuntu0.3",
"1:2015.3.14AR.1-1ubuntu0.3+esm1",
"1:2015.3.14AR.1-1ubuntu0.3+esm2",
"1:2015.3.14AR.1-1ubuntu0.3+esm3",
"1:2015.3.14AR.1-1ubuntu0.3+esm4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libntfs-3g88",
"binary_version": "1:2017.3.23-2ubuntu0.18.04.5"
},
{
"binary_name": "ntfs-3g",
"binary_version": "1:2017.3.23-2ubuntu0.18.04.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2017.3.23-2ubuntu0.18.04.5?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2016.2.22AR.2-2",
"1:2017.3.23-2",
"1:2017.3.23-2ubuntu0.18.04.1",
"1:2017.3.23-2ubuntu0.18.04.2",
"1:2017.3.23-2ubuntu0.18.04.3",
"1:2017.3.23-2ubuntu0.18.04.4",
"1:2017.3.23-2ubuntu0.18.04.5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libntfs-3g883",
"binary_version": "1:2017.3.23AR.3-3ubuntu1.3"
},
{
"binary_name": "ntfs-3g",
"binary_version": "1:2017.3.23AR.3-3ubuntu1.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2017.3.23AR.3-3ubuntu1.3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2017.3.23AR.3-3ubuntu1",
"1:2017.3.23AR.3-3ubuntu1.1",
"1:2017.3.23AR.3-3ubuntu1.2",
"1:2017.3.23AR.3-3ubuntu1.3"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libntfs-3g89",
"binary_version": "1:2021.8.22-3ubuntu1.3"
},
{
"binary_name": "ntfs-3g",
"binary_version": "1:2021.8.22-3ubuntu1.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2021.8.22-3ubuntu1.3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2021.8.22-3ubuntu1.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2017.3.23AR.3-3ubuntu5",
"1:2017.3.23AR.3-3ubuntu6",
"1:2021.8.22-3ubuntu1",
"1:2021.8.22-3ubuntu1.1",
"1:2021.8.22-3ubuntu1.2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libntfs-3g89t64",
"binary_version": "1:2022.10.3-1.2ubuntu3.1"
},
{
"binary_name": "ntfs-3g",
"binary_version": "1:2022.10.3-1.2ubuntu3.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2022.10.3-1.2ubuntu3.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2022.10.3-1.2ubuntu3.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2022.10.3-1ubuntu1",
"1:2022.10.3-1.2ubuntu1",
"1:2022.10.3-1.2ubuntu2",
"1:2022.10.3-1.2ubuntu3"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libntfs-3g89t64",
"binary_version": "1:2022.10.3-5ubuntu0.25.10.1"
},
{
"binary_name": "ntfs-3g",
"binary_version": "1:2022.10.3-5ubuntu0.25.10.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2022.10.3-5ubuntu0.25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2022.10.3-5ubuntu0.25.10.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2022.10.3-5"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libntfs-3g89t64",
"binary_version": "1:2022.10.3-5ubuntu1"
},
{
"binary_name": "ntfs-3g",
"binary_version": "1:2022.10.3-5ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "ntfs-3g",
"purl": "pkg:deb/ubuntu/ntfs-3g@1:2022.10.3-5ubuntu1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:2022.10.3-5ubuntu1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1:2022.10.3-5",
"1:2022.10.3-5build1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-40706",
"modified": "2026-05-20T15:27:26Z",
"published": "2026-04-21T12:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-40706"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40706"
},
{
"type": "REPORT",
"url": "https://github.com/tuxera/ntfs-3g/security/advisories/GHSA-4cwv-5285-63v9"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8192-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8192-2"
}
],
"related": [
"USN-8192-1",
"USN-8192-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-40706"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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