CVE-2026-3580 - Vulnerability Details - OpenCVE

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.

Attack Vector Local

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/wolfSSL/wolfssl/pull/9855

History

Thu, 19 Mar 2026 21:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 19 Mar 2026 20:00:00 +0000

Type	Values Removed	Values Added
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.
Title		Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
Weaknesses		CWE-203
References		https://github.com/wolfSSL/wolfssl/pull/9855
Metrics		cvssV4_0 `{'score': 2.1, 'vector': '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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: wolfSSL

Published: 2026-03-19T19:46:58.783Z

Updated: 2026-03-19T20:25:20.427Z

Reserved: 2026-03-05T00:16:16.057Z

Link: CVE-2026-3580

Vulnrichment

Updated: 2026-03-19T20:25:14.415Z

NVD

Status : Received

Published: 2026-03-19T20:16:14.450

Modified: 2026-03-19T20:16:14.450

Link: CVE-2026-3580

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-203

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