CVE-2026-3579
Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
Summary
Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
Original description
The description as published by the source.
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.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-3579 wolfssl
- Ubuntu UBUNTU-CVE-2026-3579 wolfssl
References
- advisory github.com
- advisory nvd.nist.gov
- patch github.com