{"id":"CVE-2026-92697","title":"FastNetMon: NetFlow v9 unbounded strlen() on interface-description field causes remote out-of-bounds read","summary":"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 le…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-125"],"vendor":"pavel-odintsov","product":"fastnetmon","affected":["fastnetmon <= 1.2.9"],"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T22:34:52.385Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-92697","references":[{"url":"https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-ff5f-p5jw-8fq2","label":"https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-ff5f-p5jw-8fq2"},{"url":"https://github.com/pavel-odintsov/fastnetmon/pull/1088","label":"https://github.com/pavel-odintsov/fastnetmon/pull/1088"},{"url":"https://github.com/pavel-odintsov/fastnetmon/commit/9dc766074dc3048ec5007bc3f6a44f2b42d1e1cb","label":"https://github.com/pavel-odintsov/fastnetmon/commit/9dc766074dc3048ec5007bc3f6a44f2b42d1e1cb"}],"tags":["cve.org"],"ingestedAt":"2026-11-05T23:41:31.941Z","epss":0.01138,"epssPercentile":0.66783,"slug":"CVE-2026-92697","body":"## Overview\n\nFastNetMon 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.\n\n## Affected\n\n- `fastnetmon <= 1.2.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}