Out-of-bounds Write and Race Condition in metrics-util

published 2021-04-07 5 y ago modified 2026-06-17 4 mo ago also GHSA-3hxh-7jxm-59x4 , GHSA-cwvc-87xq-pc5m , RUSTSEC-2021-0113 , EUVD-2022-0570

cvss: 8.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

An issue was discovered in the metrics-util crate before 0.7.0 for Rust. There is a data race and memory corruption because AtomicBucket<T> unconditionally implements the Send and Sync traits.

Patch / fix

fixed in 2 links 1

crates.io metrics-util 0.7.0
metrics-util_project metrics-util 0.7.0

github.com/metrics-rs/metrics@8e6daab commit

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
crates.io	metrics-util	<0.7.0 >=0.0.0-0, <0.7.0	0.7.0

Classification

Weakness

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
CWE-787 Out-of-bounds Write

References

github.com /metrics-rs/metrics/commit/8e6daab
web
rustsec.org /advisories/RUSTSEC-2021-0113.html
web, third-party-advisory, advisory
raw.githubusercontent.com /rustsec/advisory-db/main/crates/metrics-util/RUSTSEC-2021-0113.md
web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-45704
advisory
github.com /metrics-rs/metrics/issues/190
web, report
github.com /metrics-rs/metrics
package
crates.io /crates/metrics-util
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary