According to Foresight News, the Bitcoin Core project disclosed a Bitcoin network security vulnerability caused by a memory DoS leak due to spam headers, and stated that the problem is of high severity.
Prior to Bitcoin Core v24.0.1, an attacker could remotely crash a peer node by spamming it with a low-difficulty headchain.
Bitcoin Core has implemented protection against this DoS, where nodes will first verify that the presented chain has sufficient work before committing to storing it, making Bitcoin Core no longer rely on checkpoints to protect against any known attacks.
