VULNERABILITY INTELLIGENCE

CVE-2022-21685

CVSS score6.5 MEDIUM
EPSS probability1.33%
CISA KEVNot currently listed
Published2022-01-14
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-191
  • nvd@nist.gov: CWE-191

Primary references