Polygon hard fork restores network stability after final determinism vulnerability

Polygon successfully performed an emergency hard fork on Wednesday to resolve a software vulnerability on its PoS chain that caused a final certainty disruption of transactions. The vulnerability affected the Bor and Heimdall systems, causing milestone creation pauses, validators and services to freeze, and eventually resulted in block production pauses for 5 hours. During the breakdown, the exchange paused Polygon trading and the POL price fell 3-4%. The incident has raised concerns about network reliability, especially after recent upgrades to increase speed. Another Ethereum Layer-2 node, Linea, also suffered a failure on the same day, highlighting the ongoing stability challenges in scalable solutions.