CVE-2021-38194
CVSS v3
9.8
CRITICAL
EPSS Score
1.3 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An issue was discovered in the ark-r1cs-std crate before 0.3.1 for Rust. It does not enforce any constraints in the FieldVar::mul_by_inverse method. Thus, a prover can produce a proof that is unsound but is nonetheless verified.
Technical details
- Published
- 2021-08-08
Frequently asked questions
What is CVE-2021-38194?
An issue was discovered in the ark-r1cs-std crate before 0.3.1 for Rust. It does not enforce any constraints in the FieldVar::mul_by_inverse method. Thus, a prover can produce a proof that is unsound but is nonetheless verified.
Is CVE-2021-38194 actively exploited?
Active exploitation of CVE-2021-38194 has not been confirmed. Its EPSS score was 1.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-38194?
CVE-2021-38194 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-38194 affecting your environment?
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