Medium
tnef — security advisory
A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).
- Products
- tnef
- Affected versions
- 1.4.12-1.2, 1.4.18-1, 1.4.18-3, 1.4.18-5, 1.4.18-5build1, 1.4.18-6, 1.4.9-1, 1.4.9-1+deb8u2build0.16.04.1, 1.4.9-1+deb8u3build0.16.04.1, 1.4.9-1+deb8u4build0.16.04.1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-103679
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:58 UTC · Revision 1
Source evidence
A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).
osv:UBUNTU-CVE-2026-103679
tnef
Fixed versions: Not specified
tnef
Fixed versions: Not specified
tnef
Fixed versions: Not specified
tnef
Fixed versions: Not specified
tnef
Fixed versions: Not specified
tnef
Fixed versions: Not specified
tnef
Fixed versions: Not specified
Complete source record
{
"id": "269389a8d8b3af2604bbf38900b48b419d2521d0da6d2754a17d9507998fb550",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-103679",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-103679",
"summary": "A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).",
"evidence": "osv:UBUNTU-CVE-2026-103679",
"products": [
{
"name": {
"value": "tnef",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.9-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.9-1+deb8u2build0.16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.9-1+deb8u3build0.16.04.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.4.9-1+deb8u4build0.16.04.1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
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}
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},
{
"name": {
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"affected_versions": [
{
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"evidence": "/affected/2/versions"
},
{
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"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.18-3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
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"evidence": "/affected/4/package/name"
},
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"affected_versions": [
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}
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{
"name": {
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},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
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"evidence": "/affected/5/versions"
},
{
"value": "1.4.18-6",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "tnef",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.18-5",
"evidence": "/affected/6/versions"
},
{
"value": "1.4.18-5build1",
"evidence": "/affected/6/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-103679",
"aliases": [
"UBUNTU-CVE-2026-103679"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tnef",
"purl": "pkg:deb/ubuntu/tnef?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.4.9-1",
"1.4.9-1+deb8u2build0.16.04.1",
"1.4.9-1+deb8u3build0.16.04.1",
"1.4.9-1+deb8u4build0.16.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "1.4.9-1+deb8u4build0.16.04.1"
}
]
}
},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/tnef?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.4.12-1.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
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{
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}
]
}
},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/tnef?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.4.12-1.2",
"1.4.18-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
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}
]
}
},
{
"ranges": [
{
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}
]
}
],
"package": {
"name": "tnef",
"purl": "pkg:deb/ubuntu/tnef?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.4.18-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
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},
{
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"package": {
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.4.18-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
"binaries": [
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"binary_name": "tnef",
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]
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},
{
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"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.4.18-5build1",
"1.4.18-6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
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"binary_version": "1.4.18-6"
}
]
}
},
{
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}
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}
],
"package": {
"name": "tnef",
"purl": "pkg:deb/ubuntu/tnef?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.4.18-5",
"1.4.18-5build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103679.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "tnef",
"binary_version": "1.4.18-5build1"
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]
}
}
],
"modified": "2026-10-17T12:57:59.898180037Z",
"provider": "osv",
"upstream": [
"CVE-2026-103679"
],
"references": [
"https://ubuntu.com/security/CVE-2026-103679",
"https://www.cve.org/CVERecord?id=CVE-2026-103679",
"https://bugzilla.redhat.com/show_bug.cgi?id=2544477",
"https://access.redhat.com/security/cve/CVE-2026-103679",
"https://github.com/verdammelt/tnef"
]
},
"related_cves": [
{
"value": "CVE-2026-103679",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357834,
"published_at": "2026-10-01T12:17:00+00:00"
}