MEDIUM 5.9 NVD
CVE-2026-92694
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, FastNetMon's IPv6 top-talkers screen-draw thread in draw_table_ipv6() i
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, FastNetMon's IPv6 top-talkers screen-draw thread in draw_table_ipv6() in src/fastnetmon_logic.cpp iterates ipv6_host_counters.average_speed_map without holding counter_map_mutex while recalculate_speed() inserts new keys and may rehash the same map. The race requires networks_list to include the targeted IPv6 range. It causes confirmed undefined behavior under load; a process crash is plausible but was not observed, so reliable denial of service has not been established. No fixed release is available as of this review.
References
- https://github.com/pavel-odintsov/fastnetmon/commit/1294724ea931dc78fe545360f2193398bba353
- https://github.com/pavel-odintsov/fastnetmon/pull/1087
- https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-phrw-2q76-5m7h
This medium severity vulnerability with a CVSS score of 5.9 was published on 2026-11-05 via NVD.
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