[Bitcoin Core 24.0.1 and below versions have a high-risk vulnerability, affecting 17% of full nodes] On September 20, Bitcoin Core developers issued a new high-severity warning, saying that one in six Bitcoin nodes has a software vulnerability. On Thursday, staff of the open source Bitcoin Core project, which is responsible for maintaining the software running on more than 98% of reachable full nodes, disclosed that there are major security issues in the software running on 17% of the network's nodes. Although this vulnerability is quite serious, there are few known cases of attacks that exploit it in public records. Since the cost of generating and broadcasting block header chains to perform denial of service attacks is quite high, the vulnerability has little economic benefit for attackers. Initially, they disclosed vulnerabilities in versions 20 and below. However, every few weeks, they disclose more software vulnerabilities. Unless Bitcoin node operators update their software, up to 17% of the nodes in the network may be at risk of denial of service attacks.