CVE-2026-93424
HIGH
MEDIUM
Priority: 0.02
BB Relevance:
75/100
Published: 2026-11-05
Modified: 2026-11-10
First seen: 2026-11-05
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, peer_find_template() in src/netflow_plugin/netflow_collector.cpp and src/netflow_plugin/netflow_v9_collector.cpp returns a pointer into global_netflow9_templates after releasing the cache mutex. On deployments with at least two entries in netflow_ports, concurrent template redefinition and data-flowset processing can let add_update_peer_template() reassign the template and free its records vector while another listener dereferences the escaped pointer. An unauthenticated sender that can reach both NetFlow/IPFIX listener ports can trigger a heap-use-after-free and reliably crash FastNetMon. No fixed release is available as of this review.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| pavel-odintsov | fastnetmon | <= 1.2.9 |
| pavel-odintsov | fastnetmon | <= 1.2.9 |
References & Advisories (2)
x_refsource_MISC
x_refsource_CONFIRM