NRDAX-T0025 - Compact Block Size Integer Overflow

Memory amplification · P2P and gossip · mis-quantified bound · active · first seen 2026-07-02

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

CVE-2025-46597: cmpctblock declaring >1GB short-ids → 32-bit size-calc overflow

live exposure

No exposure data. Slashr ↗ has no risk signal mapped to this technique yet — absence of data is not absence of exposure.

instances (1)

chain	primitive	fidelity	origin	reproducer (bundle)	source
bitcoin	btc_cmpctblock_overflow	lab	reverse-engineered-cve	btc_cmpctblock_overflow	CVE-2025-46597 ↗

related (Memory amplification)

NRDAX-T0023 - Coalesced Packet Buffer Leak active NRDAX-T0038 - Count Underflow Header Serving Amplification active NRDAX-T0042 - Crypto Frame Reassembly Buffer Exhaustion active NRDAX-T0046 - Decompression Bomb Resource Exhaustion active NRDAX-T0059 - Duplicate Transport Parameter Memory Leak active NRDAX-T0061 - Duplicate Tx Mempool Index Desync active NRDAX-T0071 - Ethash Verification Memory Exhaustion active NRDAX-T0095 - GraphQL Alias Query Amplification active

cite

https://nrdax.com/techniques/NRDAX-T0025

plain

NRDAX Registry. Technique NRDAX-T0025.

bibtex

@misc{nrdax_NRDAX_T0025,
  title = {Compact Block Size Integer Overflow (NRDAX-T0025)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0025},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0025",
  "type": "dataset",
  "title": "Compact Block Size Integer Overflow (NRDAX-T0025)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0025",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0025 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0025.svg)](https://nrdax.com/techniques/NRDAX-T0025-compact-block-size-integer-overflow)

use from the CLI

Retrieve or cite this technique from a script or the terminal with the NRDAX Python library & CLI.

Retrieve this technique

nrdax get NRDAX-T0025

Cite it (BibTeX)

nrdax cite NRDAX-T0025 --format bibtex

CLI guide → GitHub ↗