Description
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.
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Remediation
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Advisories
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References
History
Thu, 05 Nov 2026 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | FastNetMon: IPv6 host counters map iterated without lock, racing concurrent inserts | |
| Weaknesses | CWE-362 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-11-05T22:29:26.943Z
Reserved: 2026-09-16T16:22:31.541Z
Link: CVE-2026-92694
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OpenCVE Enrichment
No data.
Weaknesses
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CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')