CVE-2026-5447
Received
Received - Intake
Heap Buffer Overflow in CertFromX509 via AuthorityKeyIdentifier
Publication date: 2026-04-09
Last updated on: 2026-04-29
Assigner: wolfSSL Inc.
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wolfssl | wolfssl | to 5.9.1 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-122 | A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a heap buffer overflow that occurs in the function CertFromX509 when handling the AuthorityKeyIdentifier extension of an X.509 certificate. The issue arises due to incorrect size handling, leading to a buffer overflow during the internal conversion of the certificate.
How can this vulnerability impact me? :
A heap buffer overflow can lead to memory corruption, which attackers might exploit to cause crashes, execute arbitrary code, or escalate privileges. This could compromise the security of systems processing affected X.509 certificates.
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