Home/CVE/Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. An ethash mining DAG generation
CVE

CVE-2020-26240

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. An ethash mining DAG generation

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. An ethash mining DAG generation flaw in Geth before version 1.9.24 could cause miners to erroneously calculate PoW in an upcoming epoch (estimated early January, 2021). This happened on the ETC chain on 2020-11-06.

This issue is relevant only for miners, non-mining nodes are unaffected. This issue is fixed as of 1.9.24.

MEDIUM · CVSS 5.3 EPSS 0.00386
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-682Incorrect Calculation
CWE-682Incorrect Calculation
▤

Affected Products & Versions

1
ethereum go ethereum< 1.9.24
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/ethereum/go-ethereum MODERATE fixed in 1.9.24
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Nov 2020 · 02:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

1
suse-csafopenSUSE-SU-2025:15424-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://blog.ethereum.org/2020/11/12/geth_security_release/Vendor Advisory
https://github.com/ethereum/go-ethereum/commit/d990df909d7839640143344e79356754384dcdd0PatchThird Party Advisory
https://github.com/ethereum/go-ethereum/pull/21793PatchThird Party Advisory
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-v592-xf75-856pThird Party Advisory
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