CVE-2026-3579: wolfSSL

Medium severity, CVSS 5.9. EPSS: 0.3% chance of exploitation in the next 30 days.

wolfSSL 5.8.4 on RISC-V RV32I architectures lacks a constant-time software implementation for 64-bit multiplication. The compiler-inserted __muldi3 subroutine executes in variable time based on operand values. This affects multiple SP math functions (sp_256_mul_9, sp_256_sqr_9, etc.), leading to a timing side-channel that may expose sensitive cryptographic data.

Affected products

• wolfSSL wolfSSL: version 5.8.4 only

Published 2026-03-19. Last modified 2026-06-17.