#VU125929 Heap-based buffer overflow in wolfSSL - CVE-2026-5447

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Main Vulnerability Database Vulnerabilities #VU125929

#VU125929 Heap-based buffer overflow in wolfSSL - CVE-2026-5447

Published: April 14, 2026


Vulnerability identifier: #VU125929
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-5447
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
wolfSSL
Software vendor:
wolfSSL

Description

The vulnerability allows a remote attacker to execute arbitrary code or cause a denial of service.

The vulnerability exists due to a heap-based buffer overflow in CertFromX509 when converting an X.509 certificate internally. A remote attacker can supply a crafted X.509 certificate with a malformed AuthorityKeyIdentifier extension to execute arbitrary code or cause a denial of service.

The issue is caused by incorrect size handling of the AuthorityKeyIdentifier extension.


Remediation

Install security update from vendor's website.

External links