CVE-2025-55643
Received Received - Intake
NULL Pointer Dereference in GPAC MP4Box Causes DoS

Publication date: 2026-06-15

Last updated on: 2026-06-15

Assigner: MITRE

Description
A NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.
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Meta Information
Published
2026-06-15
Last Modified
2026-06-15
Generated
2026-06-16
AI Q&A
2026-06-15
EPSS Evaluated
N/A
NVD
CVE-2025-55643
EUVD
EUVD-2025-210143
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gpac mp4box 2.4
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a NULL pointer dereference in the TrackWriter handling component (filters/mux_isom.c) of GPAC MP4Box version 2.4. It occurs when the software processes a specially crafted MP4 file, which causes the program to attempt to access a memory location through a NULL pointer.

As a result, this leads to a Denial of Service (DoS) condition, meaning the application can crash or become unresponsive when handling such malicious files.

Impact Analysis

The primary impact of this vulnerability is a Denial of Service (DoS). An attacker can exploit this by supplying a crafted MP4 file to the vulnerable GPAC MP4Box software, causing it to crash or stop functioning properly.

This can disrupt services or workflows that rely on GPAC MP4Box for processing MP4 files, potentially leading to downtime or loss of availability.

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