CVE-2020-26240— Erroneous Proof of Work calculation in geth
Quick assessment
Affected
ethereum go-ethereum
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Ethereum Go-ethereum是Ethereum社区的一个用Go语言实现以太坊协议的代码库。 Ethereum Go-ethereum 1.9.24 之前存版本在安全漏洞，该漏洞源于挖掘DAG生成漏洞可能导致矿工在即将到来的时代（估计2021年1月初）错误地计算PoW。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2020-26240
Vulnerability Information
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Vulnerability Title
Erroneous Proof of Work calculation in geth
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
数值计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Ethereum Go-ethereum 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ethereum Go-ethereum是Ethereum社区的一个用Go语言实现以太坊协议的代码库。 Ethereum Go-ethereum 1.9.24 之前存版本在安全漏洞，该漏洞源于挖掘DAG生成漏洞可能导致矿工在即将到来的时代（估计2021年1月初）错误地计算PoW。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ethereum | go-ethereum | < 1.9.24 | - |
|
II. Public POCs for CVE-2020-26240
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2020-26240 (2)
-
https://github.com/ethereum/go-ethereum/pull/21793 x_refsource_MISC
Vendor Advisories for CVE-2020-26240 (1)
-
https://github.com/ethereum/go-ethereum/security/advisories/GHSA-v592-xf75-856p x_refsource_CONFIRM
Security Blog Posts for CVE-2020-26240 (1)
-
https://blog.ethereum.org/2020/11/12/geth_security_release/ x_refsource_MISC
Same Patch Batch · ethereum · 2020-11-25 · 3 CVEs total
| CVE-2020-26241 | 6.5 MEDIUM | Shallow copy bug in geth |
| CVE-2020-26242 | 6.5 MEDIUM | Denial of service in geth |
IV. Related Vulnerabilities
Same product: go-ethereum
-
CVE-2026-26315
Go Ethereum Improperly Validates the ECIES Public Key in RLP -
CVE-2026-26314
Go Ethereum affected by DoS via malicious p2p message -
CVE-2026-26313
Go Ethereum affected by DoS via malicious p2p message -
CVE-2026-22868
go-ethereum has a DoS via malicious p2p message -
CVE-2026-22862
go-ethereum has a DoS via malicious p2p message
Same vendor: ethereum
-
CVE-2026-40072
web3.py affected by SSRF via CCIP Read (EIP-3668) OffchainLo -
CVE-2026-26315
Go Ethereum Improperly Validates the ECIES Public Key in RLP -
CVE-2026-26314
Go Ethereum affected by DoS via malicious p2p message -
CVE-2026-26313
Go Ethereum affected by DoS via malicious p2p message -
CVE-2026-22868
go-ethereum has a DoS via malicious p2p message
Same weakness: CWE-682
V. Comments for CVE-2020-26240
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