cvedb.io
CVE-2018-20421
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2018-12-24T03:29:00.353 · Last modified 2026-06-17T01:52:48.627

Summary

Go Ethereum (aka geth) 1.8.19 allows attackers to cause a denial of service (memory consumption) by rewriting the length of a dynamic array in memory, and then writing data to a single memory location with a large index number, as demonstrated by use of "assembly { mstore }" followed by a "c[0xC800000] = 0xFF" assignment.

Affected products

ethereum — go_ethereum

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.