The Layer 2 networks Linea and Polygon, operating within the Ethereum ecosystem, faced significant technical failures on September 10, 2025. Both projects publicly confirmed disruptions in their systems, leading to delays in transaction finalization and sparking a wave of discussions among users.
This is reported by Finway
Service Interruption in Linea: Centralized Sequencers Under Scrutiny
Linea experienced a critical failure in its main sequencer, resulting in a complete halt of transaction processing for over 40 minutes. According to LineaScan, no blocks were created during this time, effectively paralyzing the network. The development team quickly identified the cause of the failure and began implementing solutions to rectify it.
“We are observing a decrease in performance in the main Linea network sequencer. The issue has been identified, and a fix is being implemented,” stated Linea on the project’s status page.
Users on social media reported widespread issues with stalled transactions and the suspension of decentralized applications. According to some community members, the downtime lasted between 27 to 55 minutes. This incident has reignited discussions about the vulnerabilities of L2 networks that utilize centralized sequencers and the balance between decentralization, security, and operational speed.
Polygon: Finalization Delays Due to Bor/Erigon Client Failures
Simultaneously, Polygon recorded delays in transaction finalization related to failures in the Bor and Erigon clients. While the blockchain remained accessible online, some users encountered issues accessing applications through RPC services. The Polygon team reported that restarting nodes helped resolve the issue for many validators and RPC providers, and work to restore services continues in close collaboration with network participants.
“We see that restarting nodes has resolved the issue for many validators and RPC providers. We are actively collaborating with them to expedite the restoration of user services,” noted Polygon on the project’s status page.
Similar incidents in the past have already sparked discussions about the need to enhance the reliability and continuity of L2 solutions amid competition from other blockchains and scaling technologies.
In particular, the failures in Linea reminded many of the 2024 incident when the network was halted due to a hacker attack on the decentralized exchange Velocore. At that time, there was intense discussion regarding the balance between security, speed, and decentralization of the network.
The challenges faced by Linea and Polygon highlight that ensuring stability and resilience remains one of the main challenges for modern L2 blockchains.