DECRYPT · 2026-11-11 16:59 UTC

A High-Severity Bug Could Have Stalled Bitcoin Mining—Bitcoin Core Has a Fix

Bitcoin Core developers disclosed three security vulnerabilities, all now fixed; none allows coin theft or forgery. The high-severity flaw (CVE-2025-62861) could corrupt a node's mempool after a chain reorganization, stopping it from building block templates until restarted, which would halt mining for affected miners. A second bug (CVE-2025-62859) could let a peer stall block processing, and a third (CVE-2025-62860) wrongly gave Tor inbound connections whitelist permissions; no exploitation was reported.

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