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    CVE-2024-55563

    Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue to CVE-2024-52913. For example, the outcome of an HTLC (Hashed Timelock Contract) can be changed because a flood of transaction traffic prevents propagation of certain Lightning channel transactions.

    Published:Dec 9, 2024
    Last Modified:May 22, 2025
    EPS:Dec 9, 2024
    EPSS Score:0.00069
    CVSS Score:5.3

    Affected Products

    Vendor
    Bitcoin
    Product
    Bitcoin Core

    Exploits

    No exploit reference

    Related CVEs

    CVE-2025-46598 (CVSS 5.3) — Bitcoin Core through 29.0 allows a denial of service via a crafted transaction.…
    CVE-2025-46597 (CVSS 7.5) — Bitcoin Core 0.13.0 through 29.x has an integer overflow.…
    CVE-2025-54604 (CVSS 7.5) — Bitcoin Core through 29.0 allows Uncontrolled Resource Consumption (issue 1 of 2).…
    CVE-2025-54605 (CVSS 7.5) — Bitcoin Core through 29.0 allows Uncontrolled Resource Consumption (issue 2 of 2).…
    CVE-2019-25220 (CVSS 7.5) — Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of …
    CVE-2024-52915 (CVSS 7.5) — Bitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (memory consumption) via a cra…
    CVE-2024-52912 (CVSS 7.5) — Bitcoin Core before 0.21.0 allows a network split that is resultant from an integer overflow (calculating the …
    CVE-2024-52918 (CVSS 6.5) — Bitcoin-Qt in Bitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (memory consumpt…
    CVE-2024-52913 (CVSS 5.3) — In Bitcoin Core before 0.21.0, an attacker could prevent a node from seeing a specific unconfirmed transaction…
    CVE-2024-52914 (CVSS 7.5) — In Bitcoin Core before 0.18.0, a node could be stalled for hours when processing the orphans of a crafted unco…

    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