XRP Ledger Fixes Critical Bug That Could Have Created 18 Trillion XRP, Protecting 100B Supply
RippleX and the XRPL Foundation resolved a critical integer overflow bug on the XRP Ledger that could have generated 18 trillion unauthorized XRP. An emergency patch secured the network without any financial losses.
A critical issue on the XRP Ledger has been resolved, preventing a potential generation of 18 trillion unauthorized XRP—more than 180 times the intended 100 billion token supply limit. Although this vulnerability had been present since 2015, public ledgers showed no indications that it was ever exploited.
Following an emergency software patch, RippleX and the XRPL Foundation issued a joint statement about the vulnerability on October 9. By September 25, over 80% of trusted validators had installed the update, mitigating the danger of conflicting transaction outcomes.
How an XRP Ledger Bug Threatened the Token Supply
The network payment system contained an integer overflow vulnerability. When calculations utilized a 64-bit integer during payments involving extensive decentralized exchange offers, the resulting value shrunk.
An attacker could have leveraged this by submitting hundreds of fake orders at varying price points, allowing a seller to receive their full due while enabling a buyer to pay less than the total XRP price. The resulting discrepancy would have generated new funds accessible to the attacker.
Automated testing conducted in September by Veria AI and researcher Cayden Liao uncovered the flaw. A local proof of concept demonstrated that a single engineered XRP transaction could generate roughly 18 trillion XRP, though public network transactions of this nature never occurred.
After the researchers reported the flaw on September 22, RippleX successfully reproduced it and verified that the improperly acquired XRP tokens were transferrable. Veria AI received a $250,000 program award for the discovery. An estimated $94 billion in market value was at risk, though this did not translate to actual financial losses on the market.
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Insecure math is utilized within the supply system’s verification checks, and sharing coin addresses across wallets can deactivate additional security protocols. These flaws cannot be exploited through standard trading, as the process requires multiple offers and wallets.
Emergency XRP Ledger Patch Also Secures Batch Transactions
On September 25, engineers deployed xrpld version 3.4.1 to correct the overflow issues and improve currency supply tracking. Rather than processing faulty arithmetic, payment servers are now configured to reject compromised payments.
Unlike typical protocol modifications, this patch bypassed standard formal approval workflows. Proponents argued that waiting two weeks for formal approval leaves systems exposed to threats, and software version discrepancies among different stakeholders can prevent consensus on applying patches.
The same software release also resolved a validation flaw impacting Batch, a separate feature that permits users to submit up to eight transactions simultaneously. Inconsistent server-side transaction processing could have arisen from how internal Batch data within the RawTransaction field was managed.
Developers issued the fixBatchV1_2 patch and delayed the Batch rollout to integrate extra security measures, deploying these changes on October 9. According to researchers, this Batch vulnerability was inactive on the mainnet when discovered, resulting in no consensus failures or related losses.
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Servers operating on legacy software versions lose their eligibility to submit network improvements and must update to version 3.4.1 or later. Moving forward, the XRPL Foundation intends to evaluate past security recommendations concerning release candidate software, integrating insights from prior bounty programs, audits, and AI testing into future review initiatives.
