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    CVE-2025-54939

    LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.

    Published:Aug 1, 2025
    Last Modified:Aug 27, 2025
    EPS:Aug 1, 2025
    EPSS Score:0.00081
    CVSS Score:5.3

    Affected Products

    Vendor
    Litespeedtech
    Product
    Litespeed Web Adc
    Vendor
    Litespeedtech
    Product
    Litespeed Web Server
    Vendor
    Litespeedtech
    Product
    Lsquic
    Vendor
    Litespeedtech
    Product
    Openlitespeed

    Exploits

    https://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/https://github.com/yohannslm/CVE-2025-54939

    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