GNU Libmicrohttpd NULL Pointer Dereference Vulnerability Allowing Denial-of-Service

Vulnerability

A NULL pointer dereference vulnerability has been identified in GNU Libmicrohttpd versions through 1.0.2. This vulnerability, present in the experimental WebSocket support library 'libmicrohttpd_ws.so', can be exploited by sending a specially crafted packet, leading to a denial-of-service condition.

Impact

Exploitation of this vulnerability causes a denial-of-service condition, where the application may crash or become unresponsive.

Remediation

Users are advised to stop using 'libmicrohttpd_ws.so', as it is an experimental implementation. The vulnerability has been fixed in the official GNU Libmicrohttpd Git repository after the v1.0.2 tag.

Added: Nov 10, 2025, 5:19 AM
Updated: Nov 10, 2025, 5:19 AM

Vulnerability Rating

Custom Algorithm
spread
3.1
impact
2.5
exploitability
8.1
remediation
8.3
relevance
1.0
threat
3.2
urgency
2.9
incentive
5.8

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.