Out-of-bounds Read in Pavel-Odintsov Fastnetmon
CVE-2026-92693
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, parse_raw_packet_to_simple_packet_full() in src/simple_packet_parser_ng.cpp dereferences ipv6_extension_header_fragment_t when IpProtocolNumberIPV6_FRAG is present without first verifying that the eight-byte Fragment header remains. A crafted sFlow v5 RAW_PACKET_HEADER record can remotely reach this shared parser with the Fragment bytes omitted, causing an unauthenticated remote out-of-bounds read. The supplied harness detects the read under AddressSanitizer, but the advisory does not establish a production process crash. No fixed release is available as of this review.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (17.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Pavel-Odintsov Fastnetmon — versions <= 1.2.9
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-92693?
- CVE-2026-92693 is a high-severity vulnerability in Pavel-Odintsov Fastnetmon, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2026-11-05.
- How severe is CVE-2026-92693?
- High severity. CVSS v3 base score is 8.2 out of 10.