Is CVE-2022-39242 actively exploited?

No active exploitation of CVE-2022-39242 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-39242 be exploited remotely?

Yes. CVE-2022-39242 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-39242?

CVE-2022-39242 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2022-39242

CWE-682Published: September 24, 2022· Updated: Jun 17, 2026

5.3

CVSS v3.1

Official Description

Frontier is an Ethereum compatibility layer for Substrate. Prior to commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658, the worst case weight was always accounted as the block weight for all cases. In case of large EVM gas refunds, this can lead to block spamming attacks -- the adversary can construct blocks with transactions that have large amount of refunds or unused gases with reverts, and as a result inflate up the chain gas prices. The impact of this issue is limited in that the spamming attack would still be costly for any adversary, and it has no ability to alter any chain state. This issue has been patched in commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658. There are no known workarounds.

NVD Source

Technical Analysis

CVE-2022-39242 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.