VULNERABILITY INTELLIGENCE

CVE-2026-3580

CVSS score2.1 LOW
EPSS probability0.13%
CISA KEVNot currently listed
Published2026-03-19
Last modified2026-06-17
CVSS vectorCVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

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.

Weakness classification

  • CWE-203: Observable Discrepancy

Primary references