---
id: "CVE-2025-60469"
kind: "vulnerability"
aliases: ["CVE-2025-60469"]
title: "GPAC MP4Box: crafted AC4 file crashes the parser with a NULL dereference"
severity: "low"
cvss: null
epss: 0.00176
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["gpac", "media-processing", "mp4box", "package"]
not_affected_if: ["gpac-not-installed", "trusted-input-only"]
published_at: "2026-10-21T16:17:13+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-25T05:02:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-60469", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2025-60469", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# GPAC MP4Box: crafted AC4 file crashes the parser with a NULL dereference

GPAC's MP4Box tool, before version 2.5, dereferences a NULL pointer in gf_ac4_presentation_ch_mode when parsing an AC4 audio file. An attacker who supplies a crafted AC4 file can crash the process, causing a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `MP4Box -version` and compare against `2.5`
- Check whether the GPAC library is installed on systems that parse untrusted AC4 media

## Fix

- Upgrade GPAC/MP4Box to `2.5` or later

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-60469
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2025-60469

## From the sources

A NULL pointer dereference in the gf_ac4_presentation_ch_mode function (/media_tools/av_parsers.c) of GPAC Project/MP4Box before 2.5 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AC4 file.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_