CVE-2025-11933
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-21

Last updated on: 2025-12-03

Assigner: wolfSSL Inc.

Description
Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions.
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Meta Information
Published
2025-11-21
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-11-22
EPSS Evaluated
2026-06-15
NVD
CVE-2025-11933
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
wolfssl wolfssl From 5.8.2 (inc) to 5.8.4 (exc)
apple macos *
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
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Executive Summary

This vulnerability is an improper input validation issue in the TLS 1.3 CKS extension parsing in wolfSSL version 5.8.2 and earlier. It allows a remote unauthenticated attacker to potentially cause a denial-of-service (DoS) by sending a specially crafted ClientHello message containing duplicate CKS extensions.

Impact Analysis

The vulnerability can impact you by allowing a remote attacker to cause a denial-of-service condition on your system or application using wolfSSL 5.8.2 or earlier. This could lead to service interruptions or crashes when processing TLS 1.3 connections with malicious ClientHello messages.

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