Vulnerability MediumRUSTSEC-2021-0066 · evm-core
RUSTSEC-2021-0066: Denial of service on EVM execution due to memory over-allocation
Short answerA security vulnerability in the evm-core crate: Denial of service on EVM execution due to memory over-allocation. GitHub rates it Medium. Fixed in 0.21.1, 0.23.1, 0.24.1, 0.25.1, 0.26.1: update to a fixed version.
| Crate | evm-core |
|---|---|
| Type | Vulnerability (denial-of-service) |
| Affected versions | Before 0.21.1; from 0.22.0 before 0.23.1; from 0.24.0 before 0.24.1; from 0.25.0 before 0.25.1; from 0.26.0 before 0.26.1. |
| Fixed in | 0.21.1, 0.23.1, 0.24.1, 0.25.1, 0.26.1 |
| Severity | Medium (GitHub rating) |
| Published | 2021-05-11 |
| Last changed | 2023-11-08 |
| Also known as | GHSA-773q-5334-5gf9 |
What to do
- See which version you have:
cargo tree -i evm-core(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p evm-core. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for exampleevm-core = "0.26.1") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Prior to the patch, when executing specific EVM opcodes related to memory operations that use evm_core::Memory::copy_large, the 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.
References
- Package: crates.io/crates/evm-core
- Advisory: rustsec.org/advisories/RUSTSEC-2021-0066.html
- Web: github.com/rust-blockchain/evm
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Other advisories for evm-core
- VulnerabilityGHSA-4jwq-572w-4388 · 2024-01-30Memory over-allocation in evm crate
- VulnerabilityGHSA-4jwq-572w-4388 · 2024-01-30Memory over-allocation in evm crate
- VulnerabilityGHSA-4jwq-572w-4388 · 2024-01-30Memory over-allocation in evm crate
- VulnerabilityGHSA-4jwq-572w-4388 · 2024-01-30Memory over-allocation in evm crate
- VulnerabilityGHSA-4jwq-572w-4388 · 2024-01-30Memory over-allocation in evm crate
- VulnerabilityGHSA-4jwq-572w-4388 · 2024-01-30Memory over-allocation in evm crate
Up next
Same crateevm-core: security historyEvery advisory for this crate, and whether it is safe to use today.Read it next →Did this answer your question?