CVE-2026-3580
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
- State
- Published
- Severity
- 2.1 Low
- Published
- Mar 19, 2026
- Updated
- Mar 19, 2026
- Reserved
- Mar 5, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | 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 | wolfSSL |
Weaknesses
- CWE-203 Observable Discrepancy
Affected Products
| Product | Versions |
|---|---|
wolfSSLwolfSSL |
|
References
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