CVE-2026-5264
Received
Received - Intake
Heap Buffer Overflow in DTLS 1.3 ACK Message Processing
Publication date: 2026-04-09
Last updated on: 2026-04-29
Assigner: wolfSSL Inc.
Description
Description
Heap buffer overflow in DTLS 1.3 ACK message processing. A remote attacker can send a crafted DTLS 1.3 ACK message that triggers a heap buffer overflow.
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 during the processing of DTLS 1.3 ACK messages. A remote attacker can send a specially crafted DTLS 1.3 ACK message which triggers this overflow, potentially causing unexpected behavior or crashes.
How can this vulnerability impact me? :
The heap buffer overflow caused by this vulnerability can lead to serious impacts such as remote code execution, denial of service, or system crashes. Since the attacker can trigger this remotely without authentication, it poses a significant security risk.
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