CVE-2019-25220 Information

Description

Bitcoin Core before 24.0.1 allows remote attackers to cause a denial of service (daemon crash) via a flood of low-difficulty header chains (aka a \Chain Width Expansion\ attack) because a node does not first verify that a presented chain has enough work before committing to store it.

Reference

https://en.bitcoin.it/wiki/Common_Vulnerabilities_and_Exposures https://bitcoincore.org/en/2024/09/18/disclose-headers-oom https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-October/017354.html