Three vulnerabilities have been exposed in Bitcoin Core, including one of high severity.
Bitcoin core developers released information about three vulnerabilities discovered back in 2025. They were all fixed in October last year, but the details have only now been revealed.
The worst error affected mining. After the blockchain is reorganized, the mempool can be in the wrong state, causing miners to lose the ability to create valid block patterns. To restore operation, the node is required to reboot.
The second vulnerability allowed an attacker to delay block processing for up to 10 minutes, and the attack could be repeated indefinitely under certain conditions.
The third error concerned the column. Due to misconfiguration of the whitelist, incoming connections may be granted elevated privileges. According to the developers, the problem affected thousands of Bitcoin nodes, weakening protection against DoS attacks and some privacy mechanisms.
All three vulnerabilities are fixed in Bitcoin Core 29.2 and 30.0, released in October 2025.