CVE-2026-104427 Zebra before 6.1.0 Chain Stall via Stale parent_error_map Entry

Zebra before 6.1.0 contains an incomplete cleanup vulnerability in the state write task that allows remote unauthenticated peers to stall node synchronization by poisoning parenterrormap. Attackers can deliver a coinbase-malleated block sharing a canonical block's hash before it propagates, causi...