CVE-2021-29511

mediumpriority · track · 26EPSS 0.013 · 70 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.28% (70th) EPSS

CVSS 4 · medium

Is it mine?

23 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 2.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-770USCWE-770USCWE-787US

affected products (23)

Products and version ranges known to be affected.

rust-blockchain evm≤ = 0.24.0enisa_euvdEU
rust-blockchain evm≤ = 0.25.0enisa_euvdEU
rust-blockchain evm≤ = 0.22.0enisa_euvdEU
rust-blockchain evm≤ = 0.23.0enisa_euvdEU
rust-blockchain evm≤ < 0.21.1enisa_euvdEU
evm project evm≤ 0.21.0nvdUScpe:2.3:a:evm_project:evm:*:*:*:*:*:*:*:*
evm project evm= 0.22.0nvdUScpe:2.3:a:evm_project:evm:*:*:*:*:*:*:*:*
evm project evm= 0.23.0nvdUScpe:2.3:a:evm_project:evm:*:*:*:*:*:*:*:*
evm project evm= 0.24.0nvdUScpe:2.3:a:evm_project:evm:*:*:*:*:*:*:*:*
evm project evm= 0.25.0nvdUScpe:2.3:a:evm_project:evm:*:*:*:*:*:*:*:*
evm project evm= 0.26.0nvdUScpe:2.3:a:evm_project:evm:*:*:*:*:*:*:*:*
crates.io evm< 0.21.1osvUSpkg:cargo/evm
crates.io evm0.22.0 → 0.22.1osvUSpkg:cargo/evm
crates.io evm0.23.0 → 0.23.1osvUSpkg:cargo/evm
crates.io evm0.24.0 → 0.24.1osvUSpkg:cargo/evm
crates.io evm0.25.0 → 0.25.1osvUSpkg:cargo/evm
crates.io evm0.26.0 → 0.26.1osvUSpkg:cargo/evm
crates.io evm-core< 0.21.1osvUSpkg:cargo/evm-core
crates.io evm-core0.22.0 → 0.22.1osvUSpkg:cargo/evm-core
crates.io evm-core0.23.0 → 0.23.1osvUSpkg:cargo/evm-core

showing 20 of 23

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-4jwq-572w-4388Memory over-allocation in evm crate2024-01-30ghsa · osvUS
### Impact 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. ### Patches 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`. ### Workarounds None. Please upgrade your `evm` crate version ### References Fix commit: https://github.com/rust-blockchain/evm/commit/19ade858c430ab13eb562764a870ac9f8506f8dd ### For more information If you have any questions or comments about this advisory: * Open an issue in [evm repo](https://github.com/rust-blockchain/evm) * Email [Wei](mailto:wei@that.world)

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2021-05-12modified 2026-06-17

related (16,125)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-86950US	—OT critical	26.2% (98th)	KEV	2026-09-28
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.11 and iPadOS 18.7.11, iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1,…
CVE-2026-87491US	—OT critical	3.51% (89th)	KEV	2026-09-09
Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security…
CVE-2026-53362US	—OT critical	0.71% (53rd)	KEV	2026-07-04
In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branc…
CVE-2026-53266US	—OT critical	0.93% (61st)	KEV	2026-06-25
In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source addre…
CVE-2026-11645US	—OT critical	2.44% (84th)	KEV	2026-06-09
Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium…

+16120 more

references (10)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan