CVE-2026-92695
FastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated frames
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| fastnetmon pavel-odintsov |
<= 1.2.9 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.2 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-c27c-943r-vr8hCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/pavel-odintsov/fastnetmon/commit/5d0ee2d25fddb2db746ce4ce3326a589a2afef40CNA: GitHub_M · x_refsource_MISC
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