NRDAX-T0061 - Duplicate Tx Mempool Index Desync

Memory amplification · Consensus ingest · no bound · active · first seen 2026-07-09

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

CVE-2023-34451 (GHSA-w24w-wp77-qffm): the mempool's list + map index each other and can desync so the SAME tx appears multiple times in the list and can no longer be fully removed (only a restart clears it) - a MempoolChannel(0x30) Txs message carrying the same tx repeated drives the duplicate-insertion path; flooding identical txs is the wire signature (fixed v0.34.29 / v0.37.2).

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	cometbft_mempool_dup_tx_leak	lab	reverse-engineered-cve	cometbft_mempool_dup_tx_leak	GHSA-w24w-wp77-qffm ↗

related (Memory amplification)

NRDAX-T0023 - Coalesced Packet Buffer Leak active NRDAX-T0025 - Compact Block Size Integer Overflow 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-T0071 - Ethash Verification Memory Exhaustion active NRDAX-T0095 - GraphQL Alias Query Amplification active

cite

https://nrdax.com/techniques/NRDAX-T0061

plain

NRDAX Registry. Technique NRDAX-T0061.

bibtex

@misc{nrdax_NRDAX_T0061,
  title = {Duplicate Tx Mempool Index Desync (NRDAX-T0061)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0061},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0061",
  "type": "dataset",
  "title": "Duplicate Tx Mempool Index Desync (NRDAX-T0061)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0061",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0061 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0061.svg)](https://nrdax.com/techniques/NRDAX-T0061-duplicate-tx-mempool-index-desync)

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-T0061

Cite it (BibTeX)

nrdax cite NRDAX-T0061 --format bibtex

CLI guide → GitHub ↗