High · CVSS 7.5CVE-2026-92697

FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds readCVE-2026-92697

Answer in brief

CVE-2026-92697 records a High severity (CVSS 7.5) vulnerability in FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read. The current sources do not mark it as known exploited. The current feed maps pavel-odintsov/fastnetmon (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 5, 2026Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.5
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps pavel-odintsov/fastnetmon (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
pavel-odintsov/fastnetmongeneric	<=1.2.9	= 1.2.9

Recommended response

Check inventory. Check lockfiles and deployed manifests for pavel-odintsov/fastnetmon.
Review the reported fix. Update pavel-odintsov/fastnetmon to = 1.2.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Nov 5, 2026

Sources and claim methodology

Upstream source description

FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the NetFlow v9 collector calls strlen() on an attacker-controlled interface-description field without bounding the scan to the field’s declared length. Although fields longer than 128 bytes are excluded from this operation, an accepted field without a null terminator can cause reads beyond the field and packet buffer. An unauthenticated remote attacker who can send crafted UDP packets to the collector can trigger an out-of-bounds read and potentially crash the process, causing denial of service. No fixed release is available as of this review.

Quoted source text, attributed separately from HOL analysis.