Side-Channel Vulnerability in wolfSSL Affects Key Security
CVE-2026-3580

2.1LOW

Key Information:

Vendor

Wolfssl

Status
Wolfssl
Vendor
CVE Published:
19 March 2026

What is CVE-2026-3580?

In wolfSSL version 5.8.4, an optimization in the constant-time masking logic of the ECC scalar multiplication function can lead to a vulnerability. Specifically, the GCC compiler's optimizations can transform the protective measures into conditional branches when targeting RISC-V RV32I architecture with -O3 optimizations. This could potentially allow local attackers to perform timing analysis, thereby compromising the security of secret keys.

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Affected Version(s)

wolfSSL RISC-V 0 < 5.9.0

References

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

CVSS V4

Score:
2.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wind Wong
JSON
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