Bitcoin Core Denial-of-Service Vulnerability via Crafted Transactions

A denial-of-service vulnerability has been identified in Bitcoin Core versions through 29.0. The issue arises when the software processes unconfirmed transactions that have been specially crafted. These transactions, while non-standard and ultimately rejected, consume a significant amount of CPU time for each node that validates them. This resource exhaustion can delay block propagation across the network.

Impact

Exploitation of this vulnerability leads to increased CPU usage on affected nodes, causing a slowdown in transaction processing and block propagation.

Remediation

Users can upgrade to Bitcoin Core version 30.0 or later to address this vulnerability.