{"cve":"CVE-2013-3220","nvd":{"published":"2013-08-02T12:10:40.467","modified":"2026-06-16T23:54:43.243","status":"Modified","description":"bitcoind and Bitcoin-Qt before 0.4.9rc2, 0.5.x before 0.5.8rc2, 0.6.x before 0.6.5rc2, and 0.7.x before 0.7.3rc2, and wxBitcoin, do not properly consider whether a block's size could require an excessive number of database locks, which allows remote attackers to cause a denial of service (split) and enable certain double-spending capabilities via a large block that triggers incorrect Berkeley DB locking.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-399"],"references":["https://en.bitcoin.it/wiki/BIP_0050","https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures","https://en.bitcoin.it/wiki/BIP_0050","https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures"],"products":["bitcoin:bitcoin-qt","bitcoin:bitcoin_core","bitcoin:bitcoind","bitcoin:qitcoin-qt"],"source":"nvd","synced_at":"2026-10-19T20:29:16.037019470+00:00"},"epss":{"cve":"CVE-2013-3220","score":0.02313,"percentile":0.83404,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}