Denial of service in geth
Priority LOW 36CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-125 and the CVSS impact.
Summary
Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.18, there is a Denial-of-service (crash) during block processing. This is fixed in 1.9.18.
Why it matters now
EPSS 0.0148 74th percentileScored 2026-11-07
Fix Fixed go-ethereum (ethereum): 1.9.18github.com/ethereum/go-ethereum (Go): 1.9.18+1 more product
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ethereum | go-ethereum | before 1.9.18 | 1.9.18 | Patch available | CNA |
| — | github.com/ethereum/go-ethereum (Go) | 1.9.16 to before 1.9.18 | 1.9.18 | Patch available | GHSA-jm5c-rv3w-w83m |
| — | github.com/holiman/uint256 (Go) | 0.1.0 to before 1.1.1 | 1.1.1 | Patch available | GHSA-jm5c-rv3w-w83m |
- go-ethereum Vendorethereum Affected before 1.9.18 Fixed in 1.9.18 Patch available CNA
- github.com/ethereum/go-ethereum (Go) Vendor— Affected 1.9.16 to before 1.9.18 Fixed in 1.9.18 Patch available GHSA-jm5c-rv3w-w83m
- github.com/holiman/uint256 (Go) Vendor— Affected 0.1.0 to before 1.1.1 Fixed in 1.1.1 Patch available GHSA-jm5c-rv3w-w83m
Remediation
- Fix · CNA go-ethereum (ethereum) Fixed in 1.9.18
- Fix · GHSA-jm5c-rv3w-w83m github.com/ethereum/go-ethereum (Go) Fixed in 1.9.18 Advisory →
- Fix · GHSA-jm5c-rv3w-w83m github.com/holiman/uint256 (Go) Fixed in 1.1.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26242
- 2026-10-03 Alias added: GHSA-jm5c-rv3w-w83m
References
Advisory 3
Other 6
- https://github.com/holiman/uint256/pull/80
- https://github.com/ethereum/go-ethereum/commit/7163a6664ee664df81b9028ab3ba13b9d65a7196
- https://github.com/holiman/uint256/commit/6785da6e3eea403260a5760029e722aa4ff1716d
- https://blog.ethereum.org/2020/11/12/geth_security_release
- https://github.com/ethereum/go-ethereum
- https://pkg.go.dev/vuln/GO-2021-0103
More ethereum Go Ethereum vulnerabilities
- TI-2023-22561 Geth (aka go-ethereum) through 1.13.4, when --http --graphql is used, allows remote… CVSS 3.1HIGH 7.5
- TI-2026-21270 Go Ethereum affected by DoS via malicious p2p message CVSS 4.0HIGH 8.7
- TI-2023-21389 Denial of service via malicious p2p message in go-ethereum CVSS 3.1HIGH 7.5
- TI-2018-08612 The GetBlockHeadersMsg handler in the LES protocol implementation in Go Ethereum (aka… CVSS 3.0HIGH 7.5
- TI-2026-21271 Go Ethereum Improperly Validates the ECIES Public Key in RLPx Handshake CVSS 4.0MEDIUM 6.9
- TI-2026-21269 Go Ethereum affected by DoS via malicious p2p message CVSS 4.0MEDIUM 6.9
Sources
- CVE-2020-26242 · CVE Program
- CVE-2020-26242 · NVD
- FIRST EPSS
- GHSA-jm5c-rv3w-w83m · GitHub Advisory Database · CC BY 4.0
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