cve.bz

CVE-2021-38195

9.8 criticalEPSS 0.9%

Critical (9.8) in parity libsecp256k1. EPSS 0.9% chance of exploitation in the next 30 days. Fixed in libsecp256k1 0.5.0.

An issue was discovered in the libsecp256k1 crate before 0.5.0 for Rust. It can verify an invalid signature because it allows the R or S parameter to be larger than the curve order, aka an overflow.

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE
CWE-347
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-g4vj-x7v9-h82mcrates.iolibsecp256k1<0.5.00.5.0
RUSTSEC-2021-0076crates.iolibsecp256k1>=0.0.0-0 <0.5.00.5.0

References

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