CVE-2025-11936: wolfssl from 5.8.2 (inclusive), before 5.8.4 (exclusive); +1 more affected products

CVE-2025-11936. CVSS 3.1 base score 5.3 (MEDIUM, NVD). EPSS 0.00427 (percentile 0.35481), scored 17-Oct-2026.

Affected technology

wolfssl · from 5.8.2 (inclusive), before 5.8.4 (exclusive)
wolfssl

wolfSSL · 3.12.0 to before 5.8.4
wolfSSL

Component: wolfSSL
File: src/tls.c

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

A remote unauthenticated attacker can cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing. Vendor/CNA’s CVSS 4.0 assessment (base score 6.3/10) rates confidentiality and integrity impact as none; availability impact as low.

Published 19-Oct-2026 14:02 UTC

CWE: CWE-20
CCR priority: 21.3 /100 (P4)
CVSS 3.1: 5.3 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L · NVD
EPSS: 0.00427 · percentile 0.35481 · 2026-10-17
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-19 14:02:10.907757+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-11936.html