NRDAX-T0381 - ZMQ Message Error-Handling Crash

Pending classification · active · first seen 2026-07-17

Producer label: compute_amp. Not yet assigned a mechanism family.

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

monero PR #9052: with ZMQ-PUB enabled the ZMQ-RPC server uses zmq_poll; an INVALID non-ZMQ message (e.g. a browser HTTP request to the ZMQ-RPC TCP port) bypasses the poll filter, reaches zmq_read which returns EAGAIN, and the unhandled spurious wakeup PERMANENTLY crashes ZMQ-RPC until restart (remote availability DoS). Fixed by handling EAGAIN. Modelled as the HTTP-to-ZMQ-port wire signature. https://github.com/monero-project/monero/pull/9052

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
monero	monero_zmq_eagain_crash	lab	reverse-engineered-cve	monero_zmq_eagain_crash	github.com ↗

references

vendor-advisory: GHPR-monero-project-monero-9052

cite

https://nrdax.com/techniques/NRDAX-T0381

plain

NRDAX Registry. Technique NRDAX-T0381.

bibtex

@misc{nrdax_NRDAX_T0381,
  title = {ZMQ Message Error-Handling Crash (NRDAX-T0381)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0381},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0381",
  "type": "dataset",
  "title": "ZMQ Message Error-Handling Crash (NRDAX-T0381)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0381",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0381 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0381.svg)](https://nrdax.com/techniques/NRDAX-T0381-zmq-message-error-handling-crash)

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-T0381

Cite it (BibTeX)

nrdax cite NRDAX-T0381 --format bibtex

CLI guide → GitHub ↗