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CVE-2020-35910

18
FAUCET Score

CVE-2020-35910 describes a data race vulnerability in the lock_api Rust crate, specifically affecting versions prior to 0.4.2, due to unsoundness in MappedMutexGuard. This vulnerability has a medium severity CVSS score of 5.5, indicating a local attack vector with low complexity, requiring low privileges, and potentially leading to high availability impact. There is currently 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

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.32%
Probability of exploitation in next 30 days
EPSS Percentile
24.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0032 is in the 81st percentile among its peer group of 15,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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 0.1 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-ppj3-7jw3-8vc4medium

Data races in lock_api

Aug 25, 2021

References

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