CVE-2025-11933 — Improper Input Validation in Wolfssl

CWE-20 — Improper Input Validation5 documents5 sources
Severity
2.3LOWNVD
EPSS
0.0%
top 87.88%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Wofssl WolfsslWolfsslDebian Wolfssl+2 more
Timeline
PublishedNov 21
Latest updateNov 22

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.

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

Affected Packages6 packages

▶CVEListV5wofssl/wolfssl3.12.0 — 5.8.4
▶debiandebian/wolfssl< wolfssl 5.8.4-1 (forky)
▶NVDwolfssl/wolfssl5.8.2 — 5.8.4
▶Debianwolfssl/wolfssl< 5.8.4-1

Patches

Patch: github.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-g9wx-2hxf-f2rj: Improper Input Validation in the TLS 1↗2025-11-22
▶
OSV
CVE-2025-11933: Improper Input Validation in the TLS 1↗2025-11-21
▶

📋Vendor Advisories

2
Microsoft
DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension↗2025-11-11
▶
Debian
CVE-2025-11933: wolfssl - Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 ...↗2025
▶
CVE-2025-11933 — Improper Input Validation in Wolfssl | cvebase