What is CVE-2026-92694?

CVE-2026-92694 is a medium-severity vulnerability in Pavel-Odintsov Fastnetmon, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2026-11-05.

How severe is CVE-2026-92694?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Pavel-Odintsov Fastnetmon

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() 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.

Vulnerability class: Race Condition

Published 2026-11-05 · last modified 2026-11-05.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Pavel-Odintsov Fastnetmon — versions <= 1.2.9

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

Frequently asked questions

What is CVE-2026-92694?: CVE-2026-92694 is a medium-severity vulnerability in Pavel-Odintsov Fastnetmon, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.9/10. Published 2026-11-05.
How severe is CVE-2026-92694?: Medium severity. CVSS v3 base score is 5.9 out of 10.