CVE-2026-3579 — Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I

CVE-2026-3579

Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
wolfSSL / wolfSSL	affected 0 before 5.9.0

CWE

CWE-203

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.