DEBIAN-CVE-2026-92698

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Source
https://security-tracker.debian.org/tracker/CVE-2026-92698
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92698.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-92698
Upstream
Published
2026-11-05T23:17:02Z
Modified
2026-11-06T10:04:44Z
Severity
  • 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVSS Calculator
Summary
[none]
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.

References

Affected packages

Debian:12 / fastnetmon

Package

Name
fastnetmon
Purl
pkg:deb/debian/fastnetmon?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.4-2
1.2.4-2+deb12u1
1.2.5-1
1.2.5-2~bpo12+1
1.2.5-2
1.2.6-1~bpo12+1
1.2.6-1
1.2.7-1~bpo12+1
1.2.7-1
1.2.8-1~bpo12+1
1.2.8-1
1.2.8+git20250911-1
1.2.8+git20250911-2
1.2.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92698.json"

Debian:13 / fastnetmon

Package

Name
fastnetmon
Purl
pkg:deb/debian/fastnetmon?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.8-1
1.2.8+git20250911-1
1.2.8+git20250911-2
1.2.9-0+deb13u1
1.2.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92698.json"

Debian:14 / fastnetmon

Package

Name
fastnetmon
Purl
pkg:deb/debian/fastnetmon?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.8-1
1.2.8+git20250911-1
1.2.8+git20250911-2
1.2.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-92698.json"