During fuzzing with new version (under development) of beacon-fuzz, I found a bug leading to a Denial of Service (DoS) of teku.
More specifically, an "infinite processing" triggered using teku transition blocks.
Based on other eth2 clients errors, bug seems to be an out-of-bound issue not detected during Teku Block SSZ parsing:
./gradlew distTar installDist
# go to build foldercd build/install/
# Run teku
bin/teku transition blocks --pre=infinite_process_ssz_state_teku.ssz --network=mainnet infinite_process_ssz_block_teku.ssz
# PROCESS NEVER STOP...