FKIE_CVE-2026-3580

Vulnerability from fkie_nvd - Published: 2026-03-19 20:16 - Updated: 2026-03-23 18:57
Severity
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
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.
References
facts@wolfssl.comhttps://github.com/wolfSSL/wolfssl/pull/9855Issue Tracking
Impacted products
Vendor Product Version
wolfssl wolfssl 5.8.4
To clipboard 

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              "matchCriteriaId": "12A2E398-A7F0-4751-887C-32C7D81213E7",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "En wolfSSL 5.8.4, la l\u00f3gica 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 transformaci\u00f3n rompe la resistencia a ataques de canal lateral de la multiplicaci\u00f3n escalar ECC, lo que podr\u00eda permitir a un atacante local recuperar claves secretas mediante an\u00e1lisis de tiempos."
    }
  ],
  "id": "CVE-2026-3580",
  "lastModified": "2026-03-23T18:57:07.400",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
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          "confidentialityImpact": "HIGH",
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    "cvssMetricV40": [
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          "Recovery": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
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  "published": "2026-03-19T20:16:14.450",
  "references": [
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      "source": "facts@wolfssl.com",
      "tags": [
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      "url": "https://github.com/wolfSSL/wolfssl/pull/9855"
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  "sourceIdentifier": "facts@wolfssl.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-203"
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      "source": "facts@wolfssl.com",
      "type": "Secondary"
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  ]
}


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