Decred: Approximately 2,077.97 DCR Minted Due to Vulnerability, Decides Against Rollback

L1 blockchain Decred stated that between August 16 and 17, its mainnet inflation vulnerability was exploited, generating approximately 2,077.97 DCR. The vulnerability has existed in the consensus code since the mainnet launch in February 2016, stemming from improper handling of edge cases in the interaction between regular transaction trees and stake transaction trees, allowing double-spend inputs. The vulnerability was submitted via the bug bounty program on August 12 but was exploited before a fix was implemented. Decred has decided against a rollback to minimize impact on users. The approximately 2,000 DCR minted does not affect the 21 million hard cap and is far below the historical shortfall of subsidies due to missed votes and other causes, which exceeds 215,000 DCR. Currently, the team has developed additional double-spend monitoring services and plans to improve the emergency upgrade signaling mechanism.