CVE-2020-35886

FAUCET Score

CVE-2020-35886 is a data race vulnerability affecting the Rust 'arr' crate up to version 2020-08-25, allowing an attacker to smuggle non-Sync/Send types across thread boundaries. This medium-severity vulnerability (CVSS 4.7) requires low privileges and high attack complexity, potentially leading to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 2020-08-25CPE matchmatch criteria	cpe:2.3:a:arr_project:arr::::::rust::*

CVSS Data

CVSS version used by this source: 3.1

4.7MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.0

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.19%

Probability of exploitation in next 30 days

EPSS Percentile

9.1%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0019 is in the 48th percentile among its peer group of 1,297 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 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 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

rustGHSA-c7fw-cr3w-wvfcmedium

Multiple security issues including data race, buffer overflow, and uninitialized memory drop in arr

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2020-0034.html

Third Party Advisory