CVE-2025-11933

MEDIUM

wolfssl 5.8.2-5.8.4 - Unauthenticated Denial of Service via TLS 1.3 CKS Extension Parsing

Title source: llm
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 6.5
EPSS 0.0039
EPSS Percentile 31.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (1)
wolfssl/wolfssl 5.8.2 - 5.8.4
Published Nov 21, 2025
Tracked Since Feb 18, 2026