CVE-2026-92694

Name of the Vulnerable Software and Affected Versions FastNetMon versions prior to 1.2.10

Description A race condition exists in the IPv6 top-talkers screen-draw thread within the draw table ipv6() function in src/fastnetmon logic.cpp. The issue occurs when the thread iterates through ipv6 host counters.average speed map without holding the counter map mutex while the recalculate speed() function simultaneously inserts new keys, potentially causing a rehash of the map. This condition requires the networks list to include the targeted IPv6 range and leads to undefined behavior under load, which could potentially result in a process crash.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.