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    CVE-2022-31111

    Frontier is Substrate's Ethereum compatibility layer. In affected versions the truncation done when converting between EVM balance type and Substrate balance type was incorrectly implemented. This leads to possible discrepancy between appeared EVM transfer value and actual Substrate value transferred. It is recommended that an emergency upgrade to be planned and EVM execution temporarily paused in the mean time. The issue is patched in Frontier master branch commit fed5e0a9577c10bea021721e8c2c5c378e16bf66 and polkadot-v0.9.22 branch commit e3e427fa2e5d1200a784679f8015d4774cedc934. This vulnerability affects only EVM internal states, but not Substrate balance states or node. You can temporarily pause EVM execution (by setting up a Substrate `CallFilter` that disables `pallet-evm` and `pallet-ethereum` calls before the patch can be applied.

    Published:Jul 6, 2022
    Last Modified:Apr 23, 2025
    EPS:Jul 6, 2022
    EPSS Score:0.00419
    CVSS Score:5.3

    Affected Products

    Vendor
    Parity
    Product
    Frontier

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2023-45130 (CVSS 7.5) — Frontier is Substrate's Ethereum compatibility layer. Prior to commit aea528198b3b226e0d20cce878551fd4c0e3d5d0…
    CVE-2023-28431 (CVSS 7.5) — Frontier is an Ethereum compatibility layer for Substrate. Frontier's `modexp` precompile uses `num-bigint` cr…
    CVE-2022-39242 (CVSS 5.3) — Frontier is an Ethereum compatibility layer for Substrate. Prior to commit d3beddc6911a559a3ecc9b3f08e153dbe37…
    CVE-2022-36008 (CVSS 7.1) — Frontier is Substrate's Ethereum compatibility layer. A security issue was discovered affecting parsing of the…
    CVE-2022-21685 (CVSS 6.5) — Frontier is Substrate's Ethereum compatibility layer. Prior to commit number `8a93fdc6c9f4eb1d2f2a11b7ff1d12d7…
    CVE-2021-41138 (CVSS 5.3) — Frontier is Substrate's Ethereum compatibility layer. In the newly introduced signed Frontier-specific extrins…
    CVE-2021-39193 (CVSS 5.3) — Frontier is Substrate's Ethereum compatibility layer. Prior to commit number 0b962f218f0cdd796dadfe26c3f09e68f…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High