Vulnerability · Published Mar 19, 2026 · Assigned by wolfSSL
CVE-2026-3579Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
Low 2.1
In plain English
A low-severity security flaw in wolfSSL from wolfSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | wolfssl | 5.9.1-r0 | ALPINE-CVE-2026-3579 |
| Alpine:v3.24 | wolfssl | 5.9.0-r0 | ALPINE-CVE-2026-3579 |
| Debian:12 | wolfssl | no fix listed | DEBIAN-CVE-2026-3579 |
| Debian:13 | wolfssl | no fix listed | DEBIAN-CVE-2026-3579 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-3579 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-3579 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-3579 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2026-3579 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2026-3579 |
Affected products (as reported)
Weakness: CWE-203 · 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