CVE-2022-21685

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191

Affected software

No affected versions have been published.

Timeline

Published
Jan 14, 2022
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2022-21685: Medium severity, CVSS 6.5 | Vulnix