CVE-2026-3548

Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/wolfSSL/wolfssl/pull/9628/	Issue Tracking Patch
https://github.com/wolfSSL/wolfssl/pull/9873/	Exploit Issue Tracking Patch

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-03-19 18:16

Updated : 2026-06-17 10:43

NVD link : CVE-2026-3548

Mitre link : CVE-2026-3548

CVE.ORG link : CVE-2026-3548

JSON object : View

Products Affected

wolfssl

wolfssl

CWE

CWE-122

Heap-based Buffer Overflow

CWE-787

Out-of-bounds Write

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With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source."}, {"lang": "es", "value": "Dos vulnerabilidades de desbordamiento de b\u00fafer exist\u00edan en el analizador CRL de wolfSSL al analizar n\u00fameros CRL: un desbordamiento de b\u00fafer basado en mont\u00edculo podr\u00eda ocurrir al almacenar incorrectamente el n\u00famero CRL como una cadena hexadecimal, y un desbordamiento basado en pila para n\u00fameros CRL de tama\u00f1o suficiente. Con CRLs apropiadamente elaborados, cualquiera de estas escrituras fuera de l\u00edmites podr\u00eda ser activada. Tenga en cuenta que esto solo afecta a las compilaciones que habilitan espec\u00edficamente el soporte CRL, y el usuario necesitar\u00eda cargar un CRL de una fuente no confiable."}], "lastModified": "2026-06-17T10:43:46.083", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA3FA1CB-CEDC-4D49-9ECD-99BBF1602312", "versionEndExcluding": "5.9.0"}], "operator": "OR"}]}], "sourceIdentifier": "facts@wolfssl.com"}