Cardano Blockchain Experiences ‘Split’ Due to Transaction Error

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The perpetrator confessed, but Charles Hoskinson mentioned the FBI’s involvement.

On November 21, a “distorted” transaction occurred on Cardano The mainnet caused a technical failure, leading to a split in blockchain history.

According to the incident report from Cardano crossThe problem arose from a bug in the core software library that was not detected by the verification code. The execution of a delegation transaction led to a divergence in the blockchain, effectively splitting it into two separate chains – “poisoned” and “healthy”.

“The incident was made possible due to a specific deserialization bug that originated in 2022. This feature was not used until last year. Because of the bug, an oversized hash in an incorrect authorization transaction could pass initial checks when it should have been rejected,” experts explained.

Analysts noted that a similar attack attempt on the Preview test network preceded the “intentional anomaly.”

The network team has already released an emergency update. User funds remain unaffected.

Technically, blockchain technology has not stopped, but there has been a huge gap between the production of blocks.

The culprit has been identified

The incident was claimed by a signature pool operator named Homer J. He stated that out of curiosity, he wanted to reproduce the failed transaction, and consulted artificial intelligence for this purpose.

Sorry (I know that word is not enough given the impact of my actions) Cardano people, it was me who put the network at risk with my reckless actions yesterday evening. It started out as a personal challenge of “let’s see if I can reproduce the bad deal”, and then I was stupid enough

– Homer G (AAA) (@KpunToN00b) November 21, 2025

“I did not sell any ADA coins before my ‘production test’, I did not short sell (I don’t even know how to do that), I did not work with anyone on this, and I did not plan [the attack] Long and carefully. I have a lot to lose from my actions. “Sorry Cardano community, I really regret this,” the user wrote.

While some Supported Homer J. cited his help in identifying critical vulnerabilities, and Cardano co-founder Charles Hoskinson described the incident as “a deliberate attack by a disgruntled group.” SPO Who spent months looking for ways to damage the brand and its reputation Yug“.

There was a deliberate attack from a disgruntled SPO who had spent months in the Fake Fred dispute and actively looking for ways to damage IOG’s brand and reputation. It targeted my personal group and crashed the entire Cardano network.

Every user was…

– Charles Hoskinson (IOHK_Charles) November 21, 2025

“It targeted my personal block, causing the entire Cardano network to fail. Every user was affected. Validators lose block rewards. Double spending is possible. DeFi disruptions. It will take weeks to fix this mess, and even longer to recover the damage to the brand and reputation,” the developer said.

The network’s co-founder added that the responsible user only apologized because he was aware of an ongoing criminal investigation.

In a separate video title, Hoskinson male “The situation has stirred up a hornet’s nest”, because such actions are considered serious crimes in many jurisdictions. According to the programmer, the FBI contacted him for additional information.

“The incident is an intrusion into and disruption of a digital network. Maybe.” [those involved] I thought it was just fun and games: “Oh, look, we broke Charles’ game.”

However, ADA rates barely reacted to the incident. In recent days, the currency’s trend is in line with the general trend Market decline.