CVE-2026-92694

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    CVE-2026-92694

    Published: 5 Nov 2026Last Modified: 7 Nov 2026

    Summary: FastNetMon: IPv6 host counters map iterated without lock, racing concurrent inserts

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92694.json, https://github.com/pavel-odintsov/fastnetmon/security/advisories/GHSA-phrw-2q76-5m7h, https://nvd.nist.gov/vuln/detail/CVE-2026-92694, https://github.com/pavel-odintsov/fastnetmon/commit/1294724ea931dc78fe545360f2193398bba35381, https://github.com/pavel-odintsov/fastnetmon/pull/1087

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -1294724ea931dc78fe545360f2193398bba35381

    Affected versions

    v1.2.9
    v1.2.8
    v1.2.7
    v1.2.6
    v1.2.5
    v1.2.4
    v1.2.3
    v1.2.2
    v1.2.1
    v1.2.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-92694 | CVE-DB