Critical severity9.1NVD Advisory· Published Oct 20, 2021· Updated Jun 17, 2026
CVE-2021-42766
CVE-2021-42766
Description
The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to cause a denial of service (long-range consensus chain reorganizations), even when this adversary has little stake and cannot influence network message propagation. This can cause a protocol stall, or an increase in the profits of individual validators.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Ethereum/Proof-of-Stake (PoS) Ethereum consensus protocoldescription
- Range: <=2021-10-19
Patches
Vulnerability mechanics
References
1- arxiv.org/abs/2110.10086nvdThird Party Advisory
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