CVE-2026-92697: high-severity vulnerability in pavel-odintsov fastnetmon
FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read
Published
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18Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5
FastNetMon is a high-performance DDoS detector and sensor. In version 1.2.9 and earlier, the NetFlow v9 collector calls strlen() on an attacker-controlled interface-description field without bounding the scan to the field’s declared length. Although fields longer than 128 bytes are excluded from this operation, an accepted field without a null terminator can cause reads beyond the field and packet buffer. An unauthenticated remote attacker who can send crafted UDP packets to the collector can trigger an out-of-bounds read and potentially crash the process, causing denial of service. No fixed release is available as of this review.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
pavel-odintsov · fastnetmonRelated CVEs — pavel-odintsov fastnetmon
In the same product, most dangerous first.
CVE-2026-92698HIGHFastNetMon: sFlow header_size field trusted as parser capture length causes remote out-of-bounds readEPSS —CVE-2026-92693HIGHFastNetMon: IPv6 Fragment header dereferenced without bounds check in shared packet parserEPSS —CVE-2026-93424HIGHFastNetMon: NetFlow/IPFIX template cache returns unlocked pointers, causing heap-use-after-free on multi-port deploymentsEPSS —CVE-2026-92695HIGHFastNetMon: Legacy pcap parse_packet() has no bounds checking, causing out-of-bounds read on truncated framesEPSS —CVE-2026-92694MEDIUMFastNetMon: IPv6 host counters map iterated without lock, racing concurrent insertsEPSS —