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CVE-2020-35914

17
FAUCET Score

CVE-2020-35914 describes a data race vulnerability in the lock_api Rust crate, specifically affecting versions prior to 0.4.2, due to unsoundness in RwLockWriteGuard. This medium-severity vulnerability (CVSS 4.7) requires low-privileged local access and high attack complexity, potentially leading to a high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4.2CPE matchmatch criteria
cpe:2.3:a:lock_api_project:lock_api:*:*:*:*:*: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
0.21%
Probability of exploitation in next 30 days
EPSS Percentile
10.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0021 is in the 51st 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

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: lock_apiFixed in: 0.4.2

Vendor Advisories (1)

rustGHSA-gmv4-vmx3-x9f3medium

Data races in lock_api

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2020-0070.html
Third Party Advisory