CVE-2026-3579 Details
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.
A timing side-channel vulnerability has been identified in wolfSSL version 5.8.4 on RISC-V RV32I architectures. The issue arises because the software implementation of 64-bit multiplication lacks constant-time execution. Instead, the compiler-inserted __muldi3 subroutine operates in variable time, depending on the values of the operands. This inconsistency affects several special math functions, such as sp_256_mul_9 and sp_256_sqr_9, potentially allowing an attacker to exploit the timing variations and extract sensitive cryptographic information.
Users can update to wolfSSL version 5.8.5 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/wolfSSL/wolfssl/pull/9855 | [email protected] | Issue Tracking |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-203 | Observable Discrepancy | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wolfssl wolfssl | 5.8.4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 23, 2026 | Initial Analysis | [email protected] |
| Mar 19, 2026 | New CVE Received | [email protected] |