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CVE-2021-29511

21
FAUCET Score

CVE-2021-29511 is a denial-of-service vulnerability affecting the evm_project evm crate, a pure Rust implementation of the Ethereum Virtual Machine. The flaw allows an attacker to trigger excessive memory allocation during specific EVM memory operations, leading to a denial-of-service condition. Rated MEDIUM severity (CVSS 6.5), it requires low privileges and network access for exploitation, but has a high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.21.0CPE matchmatch criteria
cpe:2.3:a:evm_project:evm:*:*:*:*:*:rust:*:*
0.22.0CPE matchmatch criteria
cpe:2.3:a:evm_project:evm:0.22.0:*:*:*:*:rust:*:*
0.23.0CPE matchmatch criteria
cpe:2.3:a:evm_project:evm:0.23.0:*:*:*:*:rust:*:*
0.24.0CPE matchmatch criteria
cpe:2.3:a:evm_project:evm:0.24.0:*:*:*:*:rust:*:*
0.25.0CPE matchmatch criteria
cpe:2.3:a:evm_project:evm:0.25.0:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 81st percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (13)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: evmFixed in: 0.21.1
rustpatch availablevia ghsa
Product: evm-coreFixed in: 0.21.1
rustpatch availablevia ghsa
Product: evmFixed in: 0.22.1
rustpatch availablevia ghsa
Product: evmFixed in: 0.23.1
rustpatch availablevia ghsa
Product: evmFixed in: 0.24.1
rustpatch availablevia ghsa
Product: evmFixed in: 0.25.1
rustpatch availablevia ghsa
Product: evmFixed in: 0.26.1
rustpatch availablevia ghsa
Product: evm-coreFixed in: 0.22.1
rustpatch availablevia ghsa
Product: evm-coreFixed in: 0.23.1
rustpatch availablevia ghsa
Product: evm-coreFixed in: 0.24.1
rustpatch availablevia ghsa
Product: evm-coreFixed in: 0.25.1
rustpatch availablevia ghsa
Product: evm-coreFixed in: 0.26.1

Vendor Advisories (1)

rustGHSA-4jwq-572w-4388medium

Memory over-allocation in evm crate

Jan 30, 2024

References

crates.io / crates/evm
Third Party Advisory
github.com / rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8dd
PatchThird Party Advisory
github.com / rust-blockchain/evm/security/advisories/GHSA-4jwq-572w-4388
PatchThird Party Advisory