fix: reject VK with log_circuit_size=0 in UltraKeccak verifier#22319
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iakovenkos merged 2 commits intomerge-train/barretenbergfrom Apr 6, 2026
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BEGIN_COMMIT_OVERRIDE fix: reject VK with log_circuit_size=0 in UltraKeccak verifier (#22319) chore: merkle tree audit 2 (#21475) fix: graceful failures in verifier code paths + other fixes (#22311) fix: Fr::from_u64 big-endian encoding to match C++ msgpack format (#22233) fix: corrupt low-order bytes in batch verifier test to avoid non-canonical field encoding (#22333) fix: skip MsgpackRejectsNonCanonical test in WASM builds (#22335) END_COMMIT_OVERRIDE
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Summary
Fixes a memory-safety vulnerability in the native UltraKeccak non-ZK verifier where a malformed verification key with
log_circuit_size = 0causes an out-of-bounds write inget_dyadic_powers_of_challenge.