CVE-2021-29511
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…
Does this matter?
Lower severity and a low EPSS score (1.28%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.28% probability · 70th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-770, CWE-787
- Affected
- evm project/evm
- Source
- security-advisories@github.com
EPSS 1.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://crates.io/crates/evmThird Party Advisory
- https://github.com/rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8ddPatch, Third Party Advisory
- https://github.com/rust-blockchain/evm/security/advisories/GHSA-4jwq-572w-4388Patch, Third Party Advisory
- https://crates.io/crates/evmThird Party Advisory
- https://github.com/rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8ddPatch, Third Party Advisory
- https://github.com/rust-blockchain/evm/security/advisories/GHSA-4jwq-572w-4388Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.