CVE-2026-3579 — Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
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 variab…
Published: 2026-03-19 · CVSS: 2.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7