CVE-2021-42219: Denial of Service in go-ethereum

github.com/ethereum/go-ethereum Updated 02 Oct 2025

Summary

18/03/2022

Disclosed on

CVE-2021-42219

CVE

No i

Fix available

High

Severity

7.5

CVSS Score

CVE-2021-42219: Denial of service in go-ethereum. Affects github.com/ethereum/go-ethereum versions < 1.10.9. No fix is published. How to fix ↓

Free scan

Check if this vulnerability affects your application

Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or Browse

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats

SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml

Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile

Javascript package-lock.json · yarn.lock · pnpm-lock.yaml

PHP composer.lock

Python poetry.lock · requirements.txt · Pipfile.lock

Go go.mod

Rust Cargo.lock

Ruby Gemfile.lock

Dart pubspec.lock

C/C++ conan.lock

Elixir mix.lock

Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Background

go-ethereum is a Go implementation of the Ethereum protocol. It is widely used for interacting with the Ethereum blockchain and developing decentralized applications. The vulnerability in go-ethereum v1.10.9 allows attackers to cause a denial of service (DoS) by sending an excessive amount of messages to a node. This vulnerability is due to missing memory in the component /ethash/algorithm.go.

Vulnerability Detail

The vulnerability in go-ethereum v1.10.9 allows attackers to exploit a missing memory issue in the /ethash/algorithm.go component. By sending an excessive amount of messages to a node, an attacker can trigger a denial of service (DoS) condition. This can lead to the unavailability of the affected node, disrupting its normal operations. The severity of this vulnerability is rated as HIGH with a CVSS score of 7.5.

How To Fix

No fixed version is published for this vulnerability.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

Workaround

There is no known workaround for this vulnerability. It is essential to apply the fix by upgrading to a patched version of go-ethereum.

Conclusion

The vulnerability in go-ethereum v1.10.9 allows attackers to cause a denial of service (DoS) by overwhelming a node with excessive messages. To mitigate this vulnerability, it is crucial to upgrade to a patched version of go-ethereum. For further support on vulnerability remediation, you can reach out to DevNack.com.

See every vulnerability recorded for github.com/ethereum/go-ethereum →