Vulnerability · Published Nov 5, 2026 · Assigned by GitHub_M
CVE-2026-92697FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read
High 7.5
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 1.1% (higher than 67% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | fastnetmon | no fix listed | DEBIAN-CVE-2026-92697 |
| Debian:13 | fastnetmon | no fix listed | DEBIAN-CVE-2026-92697 |
| Debian:14 | fastnetmon | no fix listed | DEBIAN-CVE-2026-92697 |
| Ubuntu:26.10 | fastnetmon | no fix listed | UBUNTU-CVE-2026-92697 |
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:N/I:N/A:H