BaseFortify

Publication date: 2025-11-10

Last updated on: 2025-11-14

Assigner: JPCERT/CC

Description

NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.

CVSS Scores

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Meta Information

Published

2025-11-10

Last Modified

2025-11-14

Generated

2026-07-06

AI Q&A

2025-11-10

EPSS Evaluated

2026-07-05

NVD

CVE-2025-62689

Affected Vendors & Products

Vendor	Product	Version / Range
gnu	libmicrohttpd	to 2025-09-16 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is a NULL pointer dereference in GNU libmicrohttpd version 1.0.2 and earlier. It occurs when a specially crafted packet is sent by an attacker, causing the software to dereference a NULL pointer, which leads to a denial-of-service (DoS) condition by crashing or stopping the service.

Impact Analysis

The impact of this vulnerability is a denial-of-service (DoS) condition. An attacker can exploit it remotely by sending a specially crafted packet, causing the affected service to crash or become unavailable, which can disrupt normal operations and availability of systems using GNU libmicrohttpd.

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