Ravencoin’s RVN token fell to a record low near $0.002614 on August 12 as the network continued responding to a critical consensus vulnerability that allowed invalid blocks to enter its blockchain. The first known affected block appeared at height 4,487,776 on August 7 at 15:44:01 UTC. The exploit created the risk that several days of apparently confirmed transactions could ultimately disappear from the accepted chain.
The incident prompted Ravencoin to recommend suspending deposits and withdrawals while miners and node operators worked to establish a valid chain. Major pools 2Miners and RavenMiner began mining from the last unaffected block, 4,487,775. The recovery effort consequently depends on enough hash power converging behind a chain that excludes the exploited blocks.
KAWPOW Validation Flaw Allowed Cheap Invalid Blocks
The vulnerability originated in Ravencoin’s KAWPOW block-header validation. According to the emergency patch published by 2Miners, the nHeight value carried inside a KAWPOW header was not checked against the block’s actual position in the chain. An attacker could exploit that discrepancy to reach a validation path that skipped full proof-of-work verification. Malicious blocks could therefore be produced without performing the normal memory-hard ProgPoW computation required from legitimate miners.
2Miners released version 4.6.1.1-hf1 on August 10 to reject blocks whose declared height does not match their actual chain height from block 4,487,776 onward. The patch also adds a checkpoint at 4,487,775 and rebuilds affected chain state where necessary. Ravencoin’s own GitHub release page currently recommends the 2Miners emergency code while developers work toward a combined fix.
That recovery can produce a deep reorganization if the clean branch accumulates enough valid proof of work to become dominant. Ravencoin warned that transactions confirmed after block 4,487,775 could be reversed and may not automatically reappear in mempools for later inclusion. A transaction showing multiple confirmations during the affected window therefore cannot be treated with the normal assumptions of settlement finality.
Miner Concentration Becomes Part of the Recovery Risk
The response has also exposed the importance of mining concentration during a consensus failure. Ravencoin said 2Miners and RavenMiner controlled a majority of network hash rate as they began rebuilding the clean chain. That concentration gives the network a practical route toward convergence, but it also demonstrates how heavily recovery can depend on decisions made by a small number of mining pools.
Deposits credited from blocks that later disappear could leave platforms with accounting shortfalls, while withdrawals or internal transfers may require manual review and rebroadcast. Infrastructure providers need to verify transactions against the surviving chain before treating activity from the affected period as final.
RVN’s market decline reflects that uncertainty, with CoinGecko recording a new all-time low of roughly $0.002614 on August 12. The technical patch addresses future acceptance of the malformed blocks, but restoring a single authoritative history is a separate process. Ravencoin’s larger test is now whether patched nodes and miners can converge cleanly while exchanges reconcile transactions potentially displaced by the recovery chain.
