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    CVE-2019-25220

    Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains (aka a "Chain Width Expansion" attack) because a node does not first verify that a presented chain has enough work before committing to store it.

    Published:Nov 18, 2024
    Last Modified:May 22, 2025
    EPS:Nov 18, 2024
    EPSS Score:0.00493
    CVSS Score:7.5

    Affected Products

    Vendor
    Bitcoin
    Product
    Bitcoin Core

    Exploits

    No exploit reference

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    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