UBUNTU-CVE-2026-111146 (CVE-2026-111146)
Vulnerability from osv_ubuntu – Published: 2026-10-16 00:00 – Updated: 2026-10-16 00:00 – Source website
VLAI
Details
ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a crafted winmail.dat whose decompressed RTF lacks a NUL terminator, causing printf to over-read, crashing ytnefprint and leaking adjacent heap bytes.
Severity
6.1 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "1.5-9ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@1.5-9ubuntu0.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.5-6",
"1.5-9",
"1.5-9ubuntu0.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "1.9.2-2"
},
{
"binary_name": "ytnef-tools",
"binary_version": "1.9.2-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@1.9.2-2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9.2-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "1.9.3-1"
},
{
"binary_name": "ytnef-tools",
"binary_version": "1.9.3-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@1.9.3-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9.3-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "2.0-1"
},
{
"binary_name": "ytnef-tools",
"binary_version": "2.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@2.0-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9.3-3",
"2.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "2.1.2-1build1"
},
{
"binary_name": "ytnef-tools",
"binary_version": "2.1.2-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@2.1.2-1build1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0-1",
"2.1.2-1",
"2.1.2-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "2.1.2-1build2"
},
{
"binary_name": "ytnef-tools",
"binary_version": "2.1.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@2.1.2-1build2?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1.2-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libytnef0",
"binary_version": "2.1.2-1build2"
},
{
"binary_name": "ytnef-tools",
"binary_version": "2.1.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libytnef",
"purl": "pkg:deb/ubuntu/libytnef@2.1.2-1build2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1.2-1build1",
"2.1.2-1build2"
]
}
],
"aliases": [],
"details": "ytnef through 2.1.2 contains a heap out-of-bounds read vulnerability in MAPIPrint() that allows attackers to read past heap allocations by supplying compressed RTF properties. Attackers can deliver a crafted winmail.dat whose decompressed RTF lacks a NUL terminator, causing printf to over-read, crashing ytnefprint and leaking adjacent heap bytes.",
"id": "UBUNTU-CVE-2026-111146",
"modified": "2026-10-16T00:00:00Z",
"published": "2026-10-16T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-111146"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-111146"
},
{
"type": "REPORT",
"url": "https://github.com/Yeraze/ytnef"
},
{
"type": "REPORT",
"url": "https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#L1449-L1458"
},
{
"type": "REPORT",
"url": "https://github.com/Yeraze/ytnef/blob/d9f089144414d3b0912c29ab96f8f1c591d00319/lib/ytnef.c#L1605-L1614"
},
{
"type": "REPORT",
"url": "https://github.com/Yeraze/ytnef/issues/112"
},
{
"type": "REPORT",
"url": "https://hackmd.io/@haind-pwn/ytnef-decompressrtf-oob-read"
},
{
"type": "REPORT",
"url": "https://www.vulncheck.com/advisories/ytnef-through-2.1.2-heap-out-of-bounds-read-via-mapiprint-in-lib-ytnef-c"
}
],
"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:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-111146"
]
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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