XRP Ledger Patches Critical Integer Overflow Flaw

The vulnerability resided within the ledger's payment engine, which handles decentralized exchange transactions. Security researcher Cayden Liao and Veria AI identified an integer overflow error triggered when calculating total costs across multiple complex offers. By crafting a specific series of transactions, an attacker could have caused the system to miscalculate totals, effectively creating spendable XRP out of thin air. For this discovery, the researchers received a maximum $250,000 bounty from the XRPL Foundation.

To mitigate the risk, RippleX engineers bypassed the standard two-week amendment consensus process, opting for an emergency software update. By September 25, over 80% of validators on the default Unique Node List had transitioned to xrpld version 3.4.1. This patch introduced stricter arithmetic checks to prevent calculation overflows and ensure supply verification remains robust. Following the emergency patch, a second, separate validation fix concerning the network's Batch transaction feature was successfully activated on October 9. The foundation has since mandated that all future security reports undergo re-testing against release candidates to prevent similar oversights.