CVE-2026-3580

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.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/wolfSSL/wolfssl/pull/9855	Issue Tracking

Configurations

Configuration 1 (hide)

cpe:2.3:a:wolfssl:wolfssl:5.8.4:*:*:*:*:*:*:*

History

23 Mar 2026, 18:57

Type	Values Removed	Values Added
CPE		cpe:2.3:a:wolfssl:wolfssl:5.8.4:::::::*
Summary		(es) En wolfSSL 5.8.4, la lógica de enmascaramiento de tiempo constante en sp_256_get_entry_256_9 se optimiza en bifurcaciones condicionales (bnez) por GCC al apuntar a RISC-V RV32I con -O3. Esta transformación rompe la resistencia a ataques de canal lateral de la multiplicación escalar ECC, lo que podría permitir a un atacante local recuperar claves secretas mediante análisis de tiempos.
References	~~() https://github.com/wolfSSL/wolfssl/pull/9855 -~~	() https://github.com/wolfSSL/wolfssl/pull/9855 - Issue Tracking
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.7
First Time		Wolfssl Wolfssl wolfssl

19 Mar 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-19 20:16

Updated : 2026-03-23 18:57

NVD link : CVE-2026-3580

Mitre link : CVE-2026-3580

CVE.ORG link : CVE-2026-3580

JSON object : View

Products Affected

wolfssl

wolfssl

CWE

CWE-203

Observable Discrepancy

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