CVE-2020-26240

Q: How do I fix CVE-2020-26240?

Upgrade go ethereum to 1.9.24 or later.

Q: Is CVE-2020-26240 being actively exploited?

Not that we know of. CVE-2020-26240 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 74% of all scored CVEs.

Q: How severe is CVE-2020-26240?

CVE-2020-26240 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2020-26240 affect?

Published advisories record a fix for go ethereum (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

MEDIUMEPSS 74th pctl

5.3

CVSS v3

NVD

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

CWE-682

How to fix

Remediation Available

go ethereumNVD

Affected:< 1.9.24Fixed in:1.9.24CVE-2020-26240derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.64%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch2

Vendor Advisory1

blog.ethereum.org

Third-Party Advisory1

github.com

Related Vulnerabilities

Other CWE-682 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-30780	High	7.5	56%	-	Fix
CVE-2020-14422	Medium	5.9	13%	-	Fix
CVE-2016-7433	Medium	5.3	9.8%	-	Fix
CVE-2023-35641	High	8.8	7.2%	-	Fix
CVE-2018-8319	Critical	9.8	7.0%	-	-
CVE-2020-0022	High	8.8	6.1%	-	Fix

Common questions

How do I fix CVE-2020-26240?

Upgrade go ethereum to 1.9.24 or later.

Is CVE-2020-26240 being actively exploited?

Not that we know of. CVE-2020-26240 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 74% of all scored CVEs.

How severe is CVE-2020-26240?

CVE-2020-26240 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-26240 affect?

Published advisories record a fix for go ethereum (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.