Vulnerability · Published Nov 5, 2026 · Assigned by GitHub_M
CVE-2026-92695FastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated frames
High 8.2
In plain English
A high-severity out-of-bounds read in fastnetmon from pavel-odintsov. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Official description
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the live parse_packet() callback in src/pcap_plugin/pcap_collector.cpp is registered through pcap_loop and processes captured frames when pcap = on without checking packethdr->caplen. A short frame or an attacker-controlled IPv4 header length can make the parser dereference IP or transport headers beyond the captured bytes, causing an out-of-bounds read and process termination. No fixed release is available as of this review.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | fastnetmon | no fix listed | DEBIAN-CVE-2026-92695 |
| Debian:13 | fastnetmon | no fix listed | DEBIAN-CVE-2026-92695 |
| Debian:14 | fastnetmon | no fix listed | DEBIAN-CVE-2026-92695 |
| Ubuntu:26.10 | fastnetmon | no fix listed | UBUNTU-CVE-2026-92695 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| pavel-odintsov | fastnetmon | <= 1.2.9 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H