CVE-2026-3580

MediumCVSS 4.7/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-203

Affected software

Vendor	Product	Versions
wolfSSL	wolfSSL	< 5.9.0

References

https://github.com/wolfSSL/wolfssl/pull/9855Issue Tracking

Timeline

Published: Mar 19, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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