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CVE-2025-11933
Good to know:
Date: November 21, 2025
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.
Severity Score
Severity Score
Weakness Type (CWE)
Improper Input Validation
CWE-20Top Fix
Upgrade Version
Upgrade to version https://github.com/wolfSSL/wolfssl.git - v5.8.4-stable
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | LOW |
| User Interaction (UI): | NONE |
| Scope (S): | CHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | LOW |