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Vulnerability record · CVE-2012-1909 · published 6 August 2012

CVE-2012-1909: Bitcoin core vulnerability

Bitcoin · Bitcoin Core

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.

5.0 CVSS 2.0 Medium EPSS 2.9% · top 13.2% CWE-16 · CWE-16
5.0CVSS 2.0 base score
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2012-4684Bitcoin-qt vulnerabilityThe alert functionality in bitcoind and Bitcoin-Qt before 0.7.0 supports different character representations of the same signature data, but relies o…EPSS 2.9%7.8CVE-2013-2292Bitcoin-qt vulnerabilitybitcoind and Bitcoin-Qt 0.8.0 and earlier allow remote attackers to cause a denial of service (electricity consumption) by mining a block to create a…EPSS 2.6%7.5CVE-2025-46597Bitcoin core integer overflow vulnerabilityBitcoin Core 0.13.0 through 29.x has an integer overflow.EPSS 0.28%7.5CVE-2025-54605Bitcoin core uncontrolled resource consumption vulnerabilityBitcoin Core through 29.0 allows Uncontrolled Resource Consumption (issue 2 of 2).EPSS 0.43%7.5CVE-2025-54604Bitcoin core uncontrolled resource consumption vulnerabilityBitcoin Core through 29.0 allows Uncontrolled Resource Consumption (issue 1 of 2).EPSS 0.43%7.5CVE-2024-52916Bitcoin core allocation without limits vulnerabilityBitcoin Core before 0.15.0 allows a denial of service (OOM kill of a daemon process) via a flood of minimum difficulty headers.EPSS 0.53%7.5CVE-2024-52914Bitcoin core allocation without limits vulnerabilityIn Bitcoin Core before 0.18.0, a node could be stalled for hours when processing the orphans of a crafted unconfirmed transaction.EPSS 0.53%7.5CVE-2024-52920Bitcoin core allocation without limits vulnerabilityBitcoin Core before 0.20.0 allows remote attackers to cause a denial of service (infinite loop) via a malformed GETDATA message.EPSS 0.63%

Source: NIST National Vulnerability Database (record CVE-2012-1909), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.