Which chains halted operations this week?

TLDR

Flow (FLOW) halted its network this week following a $3.9 million exploit, then moved to a phased restart after revising its remediation plan, per a foundation update and media coverage Flow rollback controversy.

1. Validators halted Flow after an execution?layer exploit on 27 Dec (UTC), with initial plans to roll back several hours of transactions Flow halt context.
2. Partners criticized the rollback; Flowscan showed the chain stuck at a specific block height as restart work proceeded validator halt urged.
3. The foundation later abandoned a global rollback and outlined a phased recovery to preserve legitimate activity phased recovery plan.

Deep Dive

1. Exploit and Halt

Flow halted operations after an attacker exploited a flaw in its execution layer and moved funds across bridges, triggering validator coordination to stop the network and seek freezes (27 Dec, UTC) Flow halt context.

• Reports describe a $3.9 million impact and immediate steps to contain movement, including outreach to bridges and stablecoin issuers Flow halt context.
• A technical post?mortem and staged restart were signaled while remediation was validated halt confirmation.

2. Rollback Controversy

An initial plan to roll back several hours of transactions faced backlash from bridge operators and legal voices, who warned of doubled balances and unbacked assets; validators were urged to halt processing until clear remediation steps were defined validator halt urged.

• Coverage noted the chain stuck at a specific block height while restart was targeted within hours validator halt urged.
• The debate centered on trust, integrity, and coordination across custodians and bridges validator halt urged.

3. Revised Recovery Path

Flow later abandoned a global rollback, moving to a phased recovery intended to destroy only fraudulent tokens and preserve legitimate activity, with most accounts expected to remain unaffected on restart phased recovery plan.

• Media recaps cite a plan coordinated with cross?chain operators and exchanges to minimize user disruption phased recovery plan.
• Follow?on updates suggested staged restoration rather than blanket reorganization halt confirmation.

Confidence: moderate because the halt and recovery are corroborated across multiple reports; keep watching official status updates for final confirmations.

Conclusion

Flow is the notable chain that halted operations this week after a security exploit, with contentious rollback discussions evolving into a phased recovery. Operational halts highlight dependency risks across bridges and exchanges; verify status and reconciliations before acting on balances or cross?chain transfers.