CVE-2026-3579Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 2.1 LOW (v4.0, CNA)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
- Weakness (CWE)
- CWE-203
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- wolfSSL
- NVD analysis
- Analyzed
- Record last updated
- Mar 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wolfSSL wolfSSL wolfssl:wolfssl (from the name) | before 5.9.0 | CNA record |
wolfssl wolfssl wolfssl:wolfssl | 5.8.4 | NVD |
References
- https://github.com/wolfSSL/wolfssl/pull/9855issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.