CVE-2026-3580

MEDIUM

4.7

Description

In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local attacker to recover secret keys via timing analysis.

CVE Details

CVSS v3.1 Score4.7

SeverityMEDIUM

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

Attack VectorLOCAL

ComplexityHIGH

Privileges RequiredLOW

User InteractionNONE

Published3/19/2026

Last Modified3/23/2026

Sourcenvd

Honeypot Sightings0

Affected Products

wolfssl:wolfssl

Weaknesses (CWE)

CWE-203

References

https://github.com/wolfSSL/wolfssl/pull/9855(facts@wolfssl.com)

IOC Correlations

No correlations recorded

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