CVE-2026-3580
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
Summary
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
Original description
The description as published by the source.
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.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-3580 wolfssl
- Ubuntu UBUNTU-CVE-2026-3580 wolfssl
References
- advisory github.com
- advisory nvd.nist.gov
- patch github.com