CVE-2022-39242

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2022-09-23. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
45.4%
KEV
Not listed

Published

September 24, 2022

Last Modified

November 21, 2024

References (4)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
rustpallet-ethereum—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
crates.io(1)
PackageVulnerable rangeFixed inDependents
pallet-ethereum———

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-07-21 15:23 UTCEPSS rescore
  2. 2026-07-21 15:22 UTCEPSS rescore
  3. 2026-07-20 17:05 UTCEPSS rescore
  4. 2026-07-19 14:29 UTCEPSS rescore
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  1. 2026-07-06 02:21 UTCEPSS rescore
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  25. 2026-06-21 01:58 UTCEPSS rescore
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  27. 2026-06-19 19:24 UTCEPSS rescore
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  29. 2026-06-18 17:51 UTCEPSS rescore
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  39. 2026-06-11 13:58 UTCEPSS rescore
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  41. 2026-06-10 22:17 UTCEPSS rescore
  42. 2026-06-10 13:20 UTCEPSS rescore
  43. 2026-06-08 14:15 UTCEPSS rescore
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  45. 2026-06-07 15:23 UTCEPSS rescore
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  47. 2026-06-06 13:46 UTCEPSS rescore
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  65. 2026-05-29 13:43 UTCEPSS rescore
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  73. 2026-05-26 07:17 UTCEPSS rescore
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  75. 2026-05-26 07:17 UTCEPSS rescore

Frequently asked(5)

What is CVE-2022-39242?
CVE-2022-39242 is a medium vulnerability published on September 24, 2022. 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…
When was CVE-2022-39242 disclosed?
CVE-2022-39242 was first published in the National Vulnerability Database on September 24, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-39242 actively exploited?
CVE-2022-39242 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-39242?
CVE-2022-39242 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2022-39242?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-39242, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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