CVE-2025-11933 Affecting wolfssl package, versions <5.8.4-1


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.06% (20th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-DEBIANUNSTABLE-WOLFSSL-14100962
  • published23 Nov 2025
  • disclosed21 Nov 2025

Introduced: 21 Nov 2025

CVE-2025-11933  (opens in a new tab)

How to fix?

Upgrade Debian:unstable wolfssl to version 5.8.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream wolfssl package and not the wolfssl package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 Base Scores

version 3.1