NRDAX-T0326 - Unbounded Peer-Slot Sybil

Connection exhaustion · P2P and gossip · no bound · active · first seen 2026-07-09

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

Sybil (SlowMist Blockchain Common Vulnerability List): a flood of full RLPx+eth-handshake peers each with a DISTINCT node identity occupies the target's inbound peer slots and biases peer selection (eclipse precursor); accepted as full peers, unlike blank handshake floods or alien-chain pollution. SlowMist gap class; no CVE.

live exposure

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

instances (2)

chain	primitive	fidelity	origin	reproducer (bundle)	source
bitcoin	sybil_peer_identity_flood	lab	reverse-engineered-cve	sybil_peer_identity_flood	github.com ↗
ethereum	geth_sybil_identity_flood	lab	reverse-engineered-cve	geth_sybil_identity_flood	github.com ↗

references

vendor-advisory: SLOWMIST-SYBIL

related (Connection exhaustion)

NRDAX-T0041 - Cross-Chain Peer Pool Pollution active NRDAX-T0064 - Endpoint Concurrency Cap Exhaustion active NRDAX-T0099 - Half-Open Handshake Slowloris active NRDAX-T0214 - Protocol Message Flood Unbounded Goroutine active NRDAX-T0225 - QUIC Control Frame Flood active NRDAX-T0246 - Rate-Limit Key Confusion active NRDAX-T0261 - RPC Request Flood active NRDAX-T0291 - Subscription Permit Exhaustion active

cite

https://nrdax.com/techniques/NRDAX-T0326

plain

NRDAX Registry. Technique NRDAX-T0326.

bibtex

@misc{nrdax_NRDAX_T0326,
  title = {Unbounded Peer-Slot Sybil (NRDAX-T0326)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0326},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0326",
  "type": "dataset",
  "title": "Unbounded Peer-Slot Sybil (NRDAX-T0326)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0326",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0326 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0326.svg)](https://nrdax.com/techniques/NRDAX-T0326-unbounded-peer-slot-sybil)

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-T0326

Cite it (BibTeX)

nrdax cite NRDAX-T0326 --format bibtex

CLI guide → GitHub ↗