UBUNTU-CVE-2026-92698 (CVE-2026-92698)
Vulnerability from osv_ubuntu – Published: 2026-11-06 00:00 – Updated: 2026-11-06 00:00 – Source website
VLAI
Details
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, process_sflow_flow_sample() in src/sflow_plugin/sflow_collector.cpp passes the attacker-controlled sflow_raw_protocol_header_t.header_size to parse_raw_packet_to_simple_packet_full() as its trusted captured length without comparing it with the bytes remaining in the record. An inflated header_size creates a false end pointer beyond the received sFlow v5 UDP buffer, defeating the nested parser's bounds checks and causing an unauthenticated remote out-of-bounds read and process crash, with possible limited exposure of adjacent bytes through parsed flow fields. No fixed release is available as of this review.
Severity
8.2 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastnetmon",
"binary_version": "1.1.3+dfsg-6build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "fastnetmon",
"purl": "pkg:deb/ubuntu/fastnetmon@1.1.3+dfsg-6build1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.3+dfsg-3",
"1.1.3+dfsg-4",
"1.1.3+dfsg-6build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastnetmon",
"binary_version": "1.1.4-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "fastnetmon",
"purl": "pkg:deb/ubuntu/fastnetmon@1.1.4-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.1.4-1",
"1.1.4-1build3",
"1.1.4-1build4",
"1.1.4-1build5",
"1.1.4-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastnetmon",
"binary_version": "1.2.6-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "fastnetmon",
"purl": "pkg:deb/ubuntu/fastnetmon@1.2.6-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.2.5-1",
"1.2.6-1",
"1.2.6-1build1",
"1.2.6-1build2",
"1.2.6-1build3",
"1.2.6-1build4",
"1.2.6-1ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastnetmon",
"binary_version": "1.2.9-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "fastnetmon",
"purl": "pkg:deb/ubuntu/fastnetmon@1.2.9-1build2?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.2.8+git20250911-2",
"1.2.9-1",
"1.2.9-1build1",
"1.2.9-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fastnetmon",
"binary_version": "1.2.8+git20250911-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "fastnetmon",
"purl": "pkg:deb/ubuntu/fastnetmon@1.2.8+git20250911-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.2.8+git20250911-1",
"1.2.8+git20250911-1build1",
"1.2.8+git20250911-1build2",
"1.2.8+git20250911-2",
"1.2.8+git20250911-2ubuntu0.1~esm1"
]
}
],
"aliases": [],
"details": "FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, process_sflow_flow_sample() in src/sflow_plugin/sflow_collector.cpp passes the attacker-controlled sflow_raw_protocol_header_t.header_size to parse_raw_packet_to_simple_packet_full() as its trusted captured length without comparing it with the bytes remaining in the record. An inflated header_size creates a false end pointer beyond the received sFlow v5 UDP buffer, defeating the nested parser\u0027s bounds checks and causing an unauthenticated remote out-of-bounds read and process crash, with possible limited exposure of adjacent bytes through parsed flow fields. No fixed release is available as of this review.",
"id": "UBUNTU-CVE-2026-92698",
"modified": "2026-11-06T00:00:00Z",
"published": "2026-11-06T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-92698"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-92698"
},
{
"type": "REPORT",
"url": "https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-852r-3wcv-pjx2"
},
{
"type": "REPORT",
"url": "https://github.com/pavel-odintsov/fastnetmon/pull/1089"
},
{
"type": "REPORT",
"url": "https://github.com/pavel-odintsov/fastnetmon/pull/1093"
},
{
"type": "REPORT",
"url": "https://github.com/pavel-odintsov/fastnetmon/commit/6871b7383322db14405a8de1399a83da15ef3533"
},
{
"type": "REPORT",
"url": "https://github.com/pavel-odintsov/fastnetmon/commit/be81c403b9aa891f8444a6379cd4a4fbbc324a83"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-92698"
]
}
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