CVE-2026-3579 LOW

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

Vendor Wolfssl
Product wolfSSL
Weakness CWE-203
Published March 19, 2026
Last update March 24, 2026
View on NVD All CVEs

CVSS base score

2.1/10
Attack vector Local
Attack complexity High
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 19, 2026 CVE published
March 24, 2026 Record updated