Same-root-cause repeat exploit

Usual (USD0 / bUSD0 / USUAL)'s assessment for RD-F-079 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

Same-root-cause repeat requires ≥2 incidents with matching root cause. Only 1 SC exploit on record (May 2025 boundary-condition unwrap bug). Cannot be triggered. The January 2025 governance event is a different category (economic/governance, not SC exploit) and does not share a root cause with the May 2025 boundary-condition bug.

Sources #

URL
Usual Blog — Sky Vault Arbitrage RecapUsual blog Sky Vault Arbitrage Recap — single exploit; no prior exploit with same root causeretrieved 2026-05-17

Methodology #

Determine whether the protocol has been exploited ≥2 times via the same root-cause cluster.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol usual factor RD-F-079 score green collected_at 2026-05-16 20:39:44