The Bitcoin Proof-of-Work algorithm does not consider a certain attack methodology related to 80-byte block headers with a variety of initial 64-byte chunks followed by the same 16-byte chunk, multiple candidate root values ending with the same 4 bytes, and calculations involving sqrt numbers. This violates the security assumptions of (1) the choice of input, outside of the dedicated nonce area, fed into the Proof-of-Work function should not change its difficulty to evaluate and (2) every Proof-of-Work function execution should be independent. NOTE: a number of persons feel that this methodology is a benign mining optimization, not a vulnerability
Advisories

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Fixes

Solution

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Workaround

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History

Fri, 20 Feb 2026 01:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T17:02:43.380Z

Reserved: 2017-05-24T00:00:00.000Z

Link: CVE-2017-9230

cve-icon Vulnrichment

Updated: 2024-08-05T17:02:43.380Z

cve-icon NVD

Status : Deferred

Published: 2017-05-24T16:29:00.180

Modified: 2025-04-20T01:37:25.860

Link: CVE-2017-9230

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses