CVE-2021-29511: Evm Project Evm

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

evm is a pure Rust implementation of Ethereum Virtual Machine. Prior to the patch, when executing specific EVM opcodes related to memory operations that use `evm_core::Memory::copy_large`, the `evm` crate can over-allocate memory when it is not needed, making it possible for an attacker to perform denial-of-service attack. The flaw was corrected in commit `19ade85`. Users should upgrade to `==0.21.1, ==0.23.1, ==0.24.1, ==0.25.1, >=0.26.1`. There are no workarounds. Please upgrade your `evm` crate version.

Affected products

• Evm Project Evm: up to and including 0.21.0; version 0.22.0 only; version 0.23.0 only; version 0.24.0 only; version 0.25.0 only; version 0.26.0 only

Published 2021-05-12. Last modified 2026-06-17.