NRDAX-T0024 - Compact Block FillBlock Duplicate Crash

consensus_abuse · active · first seen 2026-07-07

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

CVE-2024-35202: blocktxn with txns not committed to the block merkle root → FillBlock called twice → assertion + node exit (Bitcoin Core <25.0)

instances (1)

chain	primitive	fidelity	origin	reproducer (bundle)	source
bitcoin	btc_blocktxn_double_fillblock	lab	reverse-engineered-cve	btc_blocktxn_double_fillblock	bitcoincore.org ↗

related (consensus_abuse)

NRDAX-T0056 - Duplicate Input Validation-Bypass Crash active NRDAX-T0143 - Malformed Field Gossip Before Validation active NRDAX-T0165 - Missing Zero-Guard Divide-By-Zero Halt active NRDAX-T0202 - Peer Timestamp Skew Manipulation active NRDAX-T0207 - Pre-Verify Gossip Flood active NRDAX-T0211 - Premature Processing Index-Out-Of-Range Panic active NRDAX-T0298 - Timestamp Integer Overflow Netsplit active NRDAX-T0307 - Transaction Malleability active

cite

https://nrdax.com/techniques/NRDAX-T0024

plain

NRDAX Registry. Technique NRDAX-T0024.

bibtex

@misc{nrdax_NRDAX_T0024,
  title = {Compact Block FillBlock Duplicate Crash (NRDAX-T0024)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0024},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0024",
  "type": "dataset",
  "title": "Compact Block FillBlock Duplicate Crash (NRDAX-T0024)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0024",
  "publisher": "NRDAX Registry"
}