NRDAX-T0165 - Missing Zero-Guard Divide-By-Zero Halt

Fault termination · Consensus ingest · absent invariant · active · first seen 2026-07-07

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

GHSA-x5vx-95h7-rv4p (cosmos-sdk <=0.47.15/<=0.50.11): x/group PercentageDecisionPolicy.Allow does yesCount.Quo(totalPower) with no totalPower==0 guard; a proposal on a group whose weight is driven to 0 → division-by-zero panic during FinalizeBlock → CONSENSUS FAILURE / chain halt

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
cosmos	cosmos_group_divzero_halt	lab	reverse-engineered-cve	cosmos_group_divzero_halt	GHSA-x5vx-95h7-rv4p ↗

references

ghsa: GHSA-x5vx-95h7-rv4p

related (Fault termination)

NRDAX-T0001 - Addr Message Counter Overflow Crash active NRDAX-T0005 - Array Deserialization Memcpy Corruption active NRDAX-T0013 - Bloom Filter Divide-By-Zero Crash active NRDAX-T0024 - Compact Block FillBlock Duplicate Crash active NRDAX-T0056 - Duplicate Input Validation-Bypass Crash active NRDAX-T0101 - Handshake Crypto Validation Bypass Crash active NRDAX-T0120 - Integer-Overflow Panic Control Message active NRDAX-T0122 - Integer Signedness Index OOB Crash active

cite

https://nrdax.com/techniques/NRDAX-T0165

plain

NRDAX Registry. Technique NRDAX-T0165.

bibtex

@misc{nrdax_NRDAX_T0165,
  title = {Missing Zero-Guard Divide-By-Zero Halt (NRDAX-T0165)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0165},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0165",
  "type": "dataset",
  "title": "Missing Zero-Guard Divide-By-Zero Halt (NRDAX-T0165)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0165",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0165 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0165.svg)](https://nrdax.com/techniques/NRDAX-T0165-missing-zero-guard-divide-by-zero-halt)

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-T0165

Cite it (BibTeX)

nrdax cite NRDAX-T0165 --format bibtex

CLI guide → GitHub ↗