Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer overflow occurs when converting an X.509 certificate internally due to incorrect size handling of the AuthorityKeyIdentifier extension.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

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.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
wolfSSL wolfSSL unaffected
Version Status Constraints
0 affected < 5.9.1

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Project Subscriptions

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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/10112 cve-icon cve-icon
History

Thu, 09 Apr 2026 21:00:00 +0000

Type Values Removed Values Added
Description Heap buffer overflow in CertFromX509 via AuthorityKeyIdentifier size confusion. A heap buffer overflow occurs when converting an X.509 certificate internally due to incorrect size handling of the AuthorityKeyIdentifier extension.
Title Heap buffer overflow in CertFromX509() via AuthorityKeyIdentifier
Weaknesses CWE-122
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wolfSSL

Published:

Updated: 2026-04-09T20:13:34.398Z

Reserved: 2026-04-02T19:39:14.309Z

Link: CVE-2026-5447

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-09T21:16:13.150

Modified: 2026-04-09T21:16:13.150

Link: CVE-2026-5447

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses