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Medium severity4.7NVD Advisory· Published Mar 19, 2026· Updated Jun 17, 2026

CVE-2026-3580

CVE-2026-3580

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.

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Affected products

3
  • WolfSSL/Wolfssl3 versions
    cpe:2.3:a:wolfssl:wolfssl:5.8.4:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:wolfssl:wolfssl:5.8.4:*:*:*:*:*:*:*
    • (no CPE)range: <5.8.4
    • (no CPE)range: 0

Patches

Vulnerability mechanics

References

1

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