CVE-2026-3579
Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
- State
- Published
- Severity
- 2.1 Low
- Published
- Mar 19, 2026
- Updated
- Mar 24, 2026
- Reserved
- Mar 5, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | 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 | wolfSSL |
Weaknesses
- CWE-203 Observable Discrepancy
Affected Products
| Product | Versions |
|---|---|
wolfSSLwolfSSL |
|
References
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