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

Bitcoin Core developers disclosed three fixed vulnerabilities in software used by most Bitcoin network nodes. The most serious could leave an affected miner unable to create block templates after a chain reorganisation, interrupting mining until the node was restarted.

The flaws also included a way for a peer to stall block processing and a privacy issue affecting some connections through Tor. None could steal coins, create unauthorised coins or cause a permanent network-wide split, and developers reported no evidence of exploitation. The fixes were released before the advisories, and node operators are advised to use the latest software.