🛡️ CVE-2022-21685
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-191 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Frontier is Substrate's Ethereum compatibility layer. Prior to commit number `8a93fdc6c9f4eb1d2f2a11b7ff1d12d70bf5a664`, a bug in Frontier's MODEXP precompile implementation can cause an integer underflow in certain conditions. This will cause a node crash for debug builds. For release builds (and production WebAssembly binaries), the impact is limited as it can only cause a normal EVM out-of-gas. Users who do not use MODEXP precompile in their runtime are not impacted. A patch is available in pull request #549.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-191
Public Exploit ✅ No
Source NVD
Published 2022-01-14
Updated 2026-06-08
Modified 2024-11-21

Affected Packages

Software From version Fixed in
frontier 2022-01-13
pallet-evm-precompile-modexp

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