UBUNTU-CVE-2026-40026 (CVE-2026-40026)
Vulnerability from osv_ubuntu – Published: 2026-04-08 22:16 – Updated: 2026-05-20 15:27 – Source website
VLAI
Details
The Sleuth Kit through 4.14.0 contains an out-of-bounds read vulnerability in the ISO9660 filesystem parser where the parse_susp() function trusts len_id, len_des, and len_src fields from the disk image to memcpy data into a stack buffer without verifying that the source data falls within the parsed SUSP block. An attacker can craft a malicious ISO image that causes reads past the end of the SUSP data buffer, and a zero-length SUSP entry can trigger an infinite parsing loop.
Severity
4.4 (Medium)
7.1 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk3-3",
"binary_version": "3.2.3-2.2ubuntu0.1~esm1"
},
{
"binary_name": "sleuthkit",
"binary_version": "3.2.3-2.2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@3.2.3-2.2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.2.3-2ubuntu1",
"3.2.3-2ubuntu2",
"3.2.3-2.1",
"3.2.3-2.2",
"3.2.3-2.2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk13",
"binary_version": "4.2.0-3ubuntu0.1~esm1"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.2.0-3ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.2.0-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.1.3-11ubuntu2",
"4.1.3-12ubuntu1",
"4.2.0-3",
"4.2.0-3ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk13",
"binary_version": "4.4.2-3"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.4.2-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.4.2-3?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.4.2-1",
"4.4.2-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk13",
"binary_version": "4.6.7-1build1"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.6.7-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.6.7-1build1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.6.5-1",
"4.6.7-1",
"4.6.7-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk19",
"binary_version": "4.11.1+dfsg-1"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.11.1+dfsg-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.11.1+dfsg-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.10.1+dfsg-1",
"4.11.0+dfsg-1",
"4.11.1+dfsg-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk19t64",
"binary_version": "4.12.1+dfsg-1.1ubuntu2"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.12.1+dfsg-1.1ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.12.1+dfsg-1.1ubuntu2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.12.0+dfsg-1",
"4.12.1+dfsg-1",
"4.12.1+dfsg-1.1ubuntu1",
"4.12.1+dfsg-1.1ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk19t64",
"binary_version": "4.12.1+dfsg-3"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.12.1+dfsg-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.12.1+dfsg-3?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.12.1+dfsg-1.1ubuntu2",
"4.12.1+dfsg-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libtsk19t64",
"binary_version": "4.12.1+dfsg-3build1"
},
{
"binary_name": "sleuthkit",
"binary_version": "4.12.1+dfsg-3build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "sleuthkit",
"purl": "pkg:deb/ubuntu/sleuthkit@4.12.1+dfsg-3build1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.12.1+dfsg-3",
"4.12.1+dfsg-3build1"
]
}
],
"aliases": [],
"details": "The Sleuth Kit through 4.14.0 contains an out-of-bounds read vulnerability in the ISO9660 filesystem parser where the parse_susp() function trusts len_id, len_des, and len_src fields from the disk image to memcpy data into a stack buffer without verifying that the source data falls within the parsed SUSP block. An attacker can craft a malicious ISO image that causes reads past the end of the SUSP data buffer, and a zero-length SUSP entry can trigger an infinite parsing loop.",
"id": "UBUNTU-CVE-2026-40026",
"modified": "2026-05-20T15:27:25Z",
"published": "2026-04-08T22:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-40026"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40026"
},
{
"type": "REPORT",
"url": "https://github.com/sleuthkit/sleuthkit/pull/3445"
},
{
"type": "REPORT",
"url": "https://github.com/sleuthkit/sleuthkit/commit/a95b0ac21733b059a517aaefa667a17e1bcbdee1"
},
{
"type": "REPORT",
"url": "https://mobasi.ai/sentinel"
},
{
"type": "REPORT",
"url": "https://www.vulncheck.com/advisories/sleuth-kit-iso9660-susp-extension-reference-out-of-bounds-read"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-40026"
]
}
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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
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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