{
  "id": 586460,
  "title": "Ravencoin faces four-day rollback after consensus flaw",
  "url": "https://urgent.news/2026/08/11/ravencoin-faces-four-day-rollback-after-consensus-flaw",
  "topic": "finance",
  "section": "Finance & Markets",
  "published": "2026-08-11T16:27:53.000Z",
  "source": {
    "name": "Arabian Post",
    "slug": "arabian-post",
    "url": "https://thearabianpost.com/ravencoin-faces-four-day-rollback-after-consensus-flaw/"
  },
  "original_language": "en",
  "account": "Ravencoin is grappling with the possibility of a significant blockchain reorganisation that could erase several days' worth of transactions. The issue stems from a critical software vulnerability that allowed invalid blocks to infiltrate the network's ledger. Two leading mining pools, 2Miners and RavenMiner, are constructing an alternative chain from block 4,487,775, the last block preceding the first noticed invalid block on August 7. These two entities control a majority of Ravencoin's computational power, heightening the chances that their replacement chain could assume the status of the one ultimately adopted by the network. As a result, transactions confirmed after 15:44 UTC on August 7 may be omitted from Ravencoin's official record. Payments, exchange deposits, and withdrawals made during the affected timeframe could vanish from the blockchain's recognized history. Some transactions might re-enter the network's pool of unconfirmed transactions and be processed again, although there is no assurance that this will transpire automatically. The first invalid block was documented at height 4,487,776. The flaw impacted Ravencoin's KAWPOW proof-of-work validation, enabling specially designed blocks to evade crucial checks that should have rejected them. The vulnerability involved a block-header field indicating the declared block height, which was not adequately compared to the block's actual position in the chain. This weakness could lead certain Ravencoin nodes to accept blocks that did not fulfill the computational conditions governing legitimate mining. Additional invalid blocks emerged after the initial exploitation, complicating efforts to determine an uncontested point from which the blockchain could safely proceed. 2Miners issued an emergency software patch, version 4.6.1.1-hf1, intended to reject blocks where the declared height deviates from their actual position. The patch also established a checkpoint at block 4,487,775, anchoring participating nodes to the last known unaffected block. Updating the patch may necessitate nodes to reconstruct significant portions of their chain data. RavenMiner claimed it was running the emergency fix and mining a \"clean\" chain. The pool halted payouts while the competing chains were resolved and noted that mining rewards earned during the disputed period might be affected. Ravencoin itself has cautioned users, miners, exchanges, and infrastructure operators about the consensus vulnerability, without formally endorsing any specific rollback approach. The project aimed to identify a recovery point that would minimize the risk to transaction history, but the dominant mining pools persisted in rebuilding from the block immediately before the first identified exploit. This situation underscores the influence that concentrated hashpower can wield over smaller proof-of-work networks. Bitcoin operates under a similar broad principle, with miners competing to extend the chain carrying the greatest accumulated work. However, Ravencoin possesses considerably less total computational power and a more concentrated mining distribution, allowing a small number of pools to exert greater influence during a chain split. Cryptocurrency exchanges adjusted their operations in response to the uncertainty. Upbit suspended Ravencoin deposits and withdrawals and issued a warning on RVN trading markets. Bitvavo also halted transfers, while other platforms imposed restrictions or maintenance measures while awaiting network stabilization. These precautions are substantial because exchanges could suffer losses if they credited deposits that subsequently disappear from the accepted blockchain. A customer could potentially deposit RVN, trade or withdraw another asset, and then witness the original Ravencoin deposit removed from chain history during a deep reorganisation. Ravencoin's price plummeted as the vulnerability became public, trading between $0.0028 and $0.0029 on Tuesday, a decline of more than 20% at points during the session. Trading activity surged as holders reacted to uncertainties surrounding transaction finality and the network recovery process. Ravencoin was created in 2018 as a fork of Bitcoin's code and is primarily intended for issuing and transferring digital assets. Its maximum supply is 21 billion RVN, compared to Bitcoin's 21 million-unit limit.",
  "summary": "Ravencoin is confronting the prospect of a deep blockchain reorganisation that could reverse several days of transactions after a critical software vulnerability allowed invalid blocks to enter its ledger. Two of the network’s largest mining pools, 2Miners and RavenMiner, are building an alternative chain from block 4,487,775, the last block before the first known invalid block appeared on August…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}