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TI-2025-34234 Aliases CVE-2025-54429

Polkadot Frontier's constructing smart contract can bypass precompile address bounding

Priority LOW 37CWE-704Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Polkadot Frontier is an Ethereum and EVM compatibility layer for Polkadot and Substrate. There are various account address types in Frontier, e.g. precompiled contracts, smart contracts, and externally owned accounts. Some EVM mechanisms should be unreachable by certain types of accounts for safety. For precompiles to be callable by smart contracts they must be explicitly configured as CallableByContract. If this configuration is absent, then the precompile should be unreachable via smart contract accounts. In commits prior to 0822030, the underlying implementation of CallableByContract which returned the AddressType was incorrect. It considered the contract address running under CREATE or CREATE2 to be AddressType::EOA rather than correctly as AddressType::Contract. The issue only affects users who use custom precompile implementations that utilize AddressType::EOA and AddressType::Contract. It's not directly exploitable in any of the predefined precompiles in Frontier. This is fixed in version 0822030.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00542 45th percentileScored 2026-11-07
Fix Fixed frontier (polkadot-evm): 0822030

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
polkadot-evmfrontierbefore 08220300822030Patch availableCNA
  • frontier Vendorpolkadot-evm Affected before 0822030 Fixed in 0822030 Patch available CNA

Remediation

  • Fix · CNA frontier (polkadot-evm) Fixed in 0822030

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-54429

References

  • TI-2025-34231 Polkadot Frontier contains silent failure in Curve25519 arithmetic precompiles with malformed points CVSS 4.0CRITICAL 9.9
  • TI-2025-34232 Polkadot Frontier contains missing `check_inherent` for `note_min_gas_price_target` inflates gas price CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences