CVE-2026-3580 — Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transform…
Published: 2026-03-19 · CVSS: 2.1 · CVSS 4.0
In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local attacker to recover secret keys via timing analysis.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7