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CVE-2022-39242

20
FAUCET Score

CVE-2022-39242 affects Frontier, an Ethereum compatibility layer for Substrate, stemming from an issue where large EVM gas refunds could lead to block spamming. This vulnerability, rated Medium (CVSS 5.3), allows an attacker to inflate chain gas prices, though the attack would be costly and cannot alter chain state. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog. The issue has been patched in commit d3beddc6911a559a3ecc9b3f08e153dbe37a8658, with no known workarounds.

Impacted Technologies

VendorProductVersion(s)CPE
< 2022-09-12CPE matchmatch criteria
cpe:2.3:a:parity:frontier:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.64%
Probability of exploitation in next 30 days
EPSS Percentile
46.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 30th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

rustGHSA-v57h-6hmh-g2p4medium

Weight not properly refunded after EVM execution

Sep 23, 2022

References

github.com / paritytech/frontier/pull/851
PatchThird Party Advisory
github.com / paritytech/frontier/security/advisories/GHSA-v57h-6hmh-g2p4
Third Party Advisory