Medium
assimp — security advisory
A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.
- Products
- assimp
- Affected versions
- 3.0~dfsg-4ubuntu4, 3.1.1~dfsg-5, 3.2~dfsg-1, 3.2~dfsg-2, 3.2~dfsg-3, 3.3.1~dfsg-5, 3.3.1~dfsg-5+build1, 3.3.1~dfsg-5ubuntu1, 4.0.1~dfsg-1, 4.0.1~dfsg-1~exp2, 4.1.0~dfsg-1, 4.1.0~dfsg-2, 4.1.0~dfsg-3, 4.1.0~dfsg-5, 4.1.0~dfsg-5ubuntu1, 5.0.1~ds0-1build1, 5.0.1~ds0-2, 5.0.1~ds0-3ubuntu1, 5.1.4~ds0-1, 5.1.5~ds0-1, 5.1.6~ds0-1, 5.2.0~ds0-2, 5.2.1~ds0-1, 5.2.2~ds0-1, 5.2.5~ds0-1.1build1, 5.3.1+ds-1, 5.3.1+ds-2, 5.3.1+ds-2build1, 5.4.3+ds-2, 6.0.2+ds-1, 6.0.3+ds-1, 6.0.4+ds-1, 6.0.4+ds-1build1, 6.0.5+ds-1
- Fixed versions
- Not specified
- CVEs
- CVE-2025-6120
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:34 UTC · Revision 1
Source evidence
A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.
osv:UBUNTU-CVE-2025-6120
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
assimp
Fixed versions: Not specified
Complete source record
{
"id": "cba1622600ec24915931d527584c4cdf32b8499e35c40b262f8962fe32d0d7f2",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-6120",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2025-6120",
"summary": "A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.",
"evidence": "osv:UBUNTU-CVE-2025-6120",
"products": [
{
"name": {
"value": "assimp",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.0~dfsg-4ubuntu4",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.1~dfsg-5",
"evidence": "/affected/0/versions"
},
{
"value": "3.2~dfsg-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.2~dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.2~dfsg-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.3.1~dfsg-5",
"evidence": "/affected/1/versions"
},
{
"value": "3.3.1~dfsg-5ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "3.3.1~dfsg-5+build1",
"evidence": "/affected/1/versions"
},
{
"value": "4.0.1~dfsg-1~exp2",
"evidence": "/affected/1/versions"
},
{
"value": "4.0.1~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.1.0~dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "4.1.0~dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "4.1.0~dfsg-3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.1.0~dfsg-5",
"evidence": "/affected/2/versions"
},
{
"value": "4.1.0~dfsg-5ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "5.0.1~ds0-1build1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.0.1~ds0-2",
"evidence": "/affected/3/versions"
},
{
"value": "5.0.1~ds0-3ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "5.1.4~ds0-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.1.5~ds0-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.1.6~ds0-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.2.0~ds0-2",
"evidence": "/affected/3/versions"
},
{
"value": "5.2.1~ds0-1",
"evidence": "/affected/3/versions"
},
{
"value": "5.2.2~ds0-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.2.5~ds0-1.1build1",
"evidence": "/affected/4/versions"
},
{
"value": "5.3.1+ds-1",
"evidence": "/affected/4/versions"
},
{
"value": "5.3.1+ds-2",
"evidence": "/affected/4/versions"
},
{
"value": "5.3.1+ds-2build1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.4.3+ds-2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "6.0.4+ds-1build1",
"evidence": "/affected/6/versions"
},
{
"value": "6.0.5+ds-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "assimp",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "5.4.3+ds-2",
"evidence": "/affected/7/versions"
},
{
"value": "6.0.2+ds-1",
"evidence": "/affected/7/versions"
},
{
"value": "6.0.3+ds-1",
"evidence": "/affected/7/versions"
},
{
"value": "6.0.4+ds-1",
"evidence": "/affected/7/versions"
},
{
"value": "6.0.4+ds-1build1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2025-6120",
"aliases": [
"UBUNTU-CVE-2025-6120"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"3.0~dfsg-4ubuntu4",
"3.1.1~dfsg-5",
"3.2~dfsg-1",
"3.2~dfsg-2",
"3.2~dfsg-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-utils",
"binary_version": "3.2~dfsg-3"
},
{
"binary_name": "libassimp3v5",
"binary_version": "3.2~dfsg-3"
},
{
"binary_name": "python-pyassimp",
"binary_version": "3.2~dfsg-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"3.3.1~dfsg-5",
"3.3.1~dfsg-5ubuntu1",
"3.3.1~dfsg-5+build1",
"4.0.1~dfsg-1~exp2",
"4.0.1~dfsg-1",
"4.1.0~dfsg-1",
"4.1.0~dfsg-2",
"4.1.0~dfsg-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-utils",
"binary_version": "4.1.0~dfsg-3"
},
{
"binary_name": "libassimp4",
"binary_version": "4.1.0~dfsg-3"
},
{
"binary_name": "python-pyassimp",
"binary_version": "4.1.0~dfsg-3"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "4.1.0~dfsg-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"4.1.0~dfsg-5",
"4.1.0~dfsg-5ubuntu1",
"5.0.1~ds0-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-testmodels",
"binary_version": "5.0.1~ds0-1build1"
},
{
"binary_name": "assimp-utils",
"binary_version": "5.0.1~ds0-1build1"
},
{
"binary_name": "libassimp5",
"binary_version": "5.0.1~ds0-1build1"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "5.0.1~ds0-1build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"5.0.1~ds0-2",
"5.0.1~ds0-3ubuntu1",
"5.1.4~ds0-1",
"5.1.5~ds0-1",
"5.1.6~ds0-1",
"5.2.0~ds0-2",
"5.2.1~ds0-1",
"5.2.2~ds0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-testmodels",
"binary_version": "5.2.2~ds0-1"
},
{
"binary_name": "assimp-utils",
"binary_version": "5.2.2~ds0-1"
},
{
"binary_name": "libassimp5",
"binary_version": "5.2.2~ds0-1"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "5.2.2~ds0-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"5.2.5~ds0-1.1build1",
"5.3.1+ds-1",
"5.3.1+ds-2",
"5.3.1+ds-2build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-testmodels",
"binary_version": "5.3.1+ds-2build1"
},
{
"binary_name": "assimp-utils",
"binary_version": "5.3.1+ds-2build1"
},
{
"binary_name": "libassimp5",
"binary_version": "5.3.1+ds-2build1"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "5.3.1+ds-2build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"5.4.3+ds-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-testmodels",
"binary_version": "5.4.3+ds-2"
},
{
"binary_name": "assimp-utils",
"binary_version": "5.4.3+ds-2"
},
{
"binary_name": "libassimp5",
"binary_version": "5.4.3+ds-2"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "5.4.3+ds-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"6.0.4+ds-1build1",
"6.0.5+ds-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-testmodels",
"binary_version": "6.0.5+ds-1"
},
{
"binary_name": "assimp-utils",
"binary_version": "6.0.5+ds-1"
},
{
"binary_name": "libassimp6",
"binary_version": "6.0.5+ds-1"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "6.0.5+ds-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "assimp",
"purl": "pkg:deb/ubuntu/assimp?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"5.4.3+ds-2",
"6.0.2+ds-1",
"6.0.3+ds-1",
"6.0.4+ds-1",
"6.0.4+ds-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6120.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "assimp-testmodels",
"binary_version": "6.0.4+ds-1build1"
},
{
"binary_name": "assimp-utils",
"binary_version": "6.0.4+ds-1build1"
},
{
"binary_name": "libassimp6",
"binary_version": "6.0.4+ds-1build1"
},
{
"binary_name": "python3-pyassimp",
"binary_version": "6.0.4+ds-1build1"
}
]
}
}
],
"modified": "2026-10-17T12:57:10.160056194Z",
"provider": "osv",
"upstream": [
"CVE-2025-6120"
],
"references": [
"https://ubuntu.com/security/CVE-2025-6120",
"https://www.cve.org/CVERecord?id=CVE-2025-6120",
"https://github.com/assimp/assimp/issues/6220",
"https://github.com/assimp/assimp/issues/6220#issuecomment-2945018579",
"https://github.com/user-attachments/files/20605340/read_meshes_reproduce.tar.gz",
"https://vuldb.com/?ctiid.312589",
"https://vuldb.com/?id.312589",
"https://vuldb.com/?submit.591235"
]
},
"related_cves": [
{
"value": "CVE-2025-6120",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 356829,
"published_at": "2025-06-16T12:15:00+00:00"
}