CVE-2020-26240

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    CVE-2020-26240

    Published: 25 Nov 2020Last Modified: 7 Aug 2026

    Summary:

    Details: 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

    References: https://blog.ethereum.org/2020/11/12/geth_security_release/, https://github.com/ethereum/go-ethereum/security/advisories/GHSA-v592-xf75-856p, https://github.com/ethereum/go-ethereum/commit/d990df909d7839640143344e79356754384dcdd0, https://github.com/ethereum/go-ethereum/pull/21793

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -cc05b050df5f88e80bb26aaf6d2f339c49c2d702

    Affected versions

    v1.9.23
    v1.9.22
    v1.9.21
    v1.9.20
    v1.9.19
    v1.9.18
    v1.9.17
    v1.9.16
    v1.9.15
    v1.9.14
    v1.9.13
    v1.9.12
    v1.9.11
    v1.9.10
    v1.9.9
    v1.9.8
    v1.9.7
    v1.9.6
    v1.9.5
    v1.9.4
    v1.9.3
    v1.9.2
    v1.9.1
    v1.9.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2020-26240 | CVE-DB