Notice of Emergency Upgrade

[theshelb]

@Delegates Matter Labs posted a full incident report in response to the emergency protocol upgrade that was executed on May 16th.

You can find the full incident report here:

Incident Report: CodeOracle memory page divergence

Incident summary On Wednesday, May 14, 2025, a bug was found in the implementation of the ZKsync sequencer’s virtual machine (VM) that led to an unprovable batch being generated on Abstract. This led to a delay in finalization and withdrawals from the chain while the incident was being resolved. The sequencer VM was patched, and the fix was rolled out to all chains in the Elastic Network. An emergency protocol upgrade was prepared and deployed to finalize the previously unproved batch. The ZKsy…