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    CVE-2012-1909

    The Bitcoin protocol, as used in bitcoind before 0.4.4, wxBitcoin, Bitcoin-Qt, and other programs, does not properly handle multiple transactions with the same identifier, which allows remote attackers to cause a denial of service (unspendable transaction) by leveraging the ability to create a duplicate coinbase transaction.

    Published:Aug 6, 2012
    Last Modified:Apr 11, 2025
    EPS:Aug 6, 2012
    EPSS Score:0.01382
    CVSS Score:5

    Affected Products

    Vendor
    Bitcoin
    Product
    Bitcoin Core
    Vendor
    Bitcoin
    Product
    Wxbitcoin

    Exploits

    https://github.com/sipa/bitcoin/commit/a206b0ea12eb4606b93323268fc81a4f1f952531https://github.com/sipa/bitcoin/commit/a206b0ea12eb4606b93323268fc81a4f1f952531

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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-2024-55563 (CVSS 5.3) — Bitcoin Core through 27.2 allows transaction-relay jamming via an off-chain protocol attack, a related issue t…
    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…

    References

    http://r6.ca/blog/20120206T005236Z.html
    http://sourceforge.net/mailarchive/forum.php?thread_name=CAPg%2BsBhmGHnMResVxPDZdfpmWTb9uqD0RrQD7oSXBQq7oHpm8g%40mail.gmail.com&forum_name=bitcoin-development
    https://bitcointalk.org/index.php?topic=67738.0
    https://bugs.gentoo.org/show_bug.cgi?id=407793
    https://en.bitcoin.it/wiki/BIP_0030
    https://en.bitcoin.it/wiki/CVEs
    https://github.com/sipa/bitcoin/commit/a206b0ea12eb4606b93323268fc81a4f1f952531
    http://r6.ca/blog/20120206T005236Z.html
    http://sourceforge.net/mailarchive/forum.php?thread_name=CAPg%2BsBhmGHnMResVxPDZdfpmWTb9uqD0RrQD7oSXBQq7oHpm8g%40mail.gmail.com&forum_name=bitcoin-development
    https://bitcointalk.org/index.php?topic=67738.0
    https://bugs.gentoo.org/show_bug.cgi?id=407793
    https://en.bitcoin.it/wiki/BIP_0030
    https://en.bitcoin.it/wiki/CVEs
    https://github.com/sipa/bitcoin/commit/a206b0ea12eb4606b93323268fc81a4f1f952531

    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