Highlights
Denial of Service: 21 prior fixes. Scrutinize any change in this area.
core/runtime: most-fixed (3 issues). Treat as high-risk during review.
22 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Denial of Service: The WebSocket server implementation has historically been vulnerable to unconstrained session allocation, missing socket state validation, and unhandled connection timeouts, allowing remote attackers to exhaust available connections and crash the node.
Memory Safety: WASM runtime execution interfaces are exposed to critical memory corruption issues, including use-after-free conditions from dangling memory handles and out-of-bounds host API memory accesses.
Auth Bypass: Failure to enforce complete cryptographic validation checks on critical consensus-related messages (such as block justifications and GRANDPA vote signatures) has previously enabled unverified block ingestion.