[Cardano Experiences Chain Split Due to Old Code Vulnerability, FBI Launches Investigation] On November 23, the Cardano network experienced a temporary chain split caused by a 'malformed' delegated transaction. This transaction exploited an old code vulnerability in the blockchain's underlying software library, leading to discrepancies in how nodes processed the transaction and ultimately triggering the network split. The incident was caused by ADA staking pool operator Homer J, who used AI-generated code to initiate the transaction, and he has admitted responsibility. Staking pool operators are required to download the latest node software to resolve the issue and merge the split chain. Cardano founder Charles Hoskinson described the event as a network attack, and the FBI has launched an investigation. Some community members believe this incident has exposed critical vulnerabilities.