# CVE-2025-60480: GPAC MP4Box heap buffer overflow in AC4 parsing

Source: https://junglewise.ai/threats/cve-2025-60480-a-heap-buffer-overflow-in-the-gf-odf-ac4-cfg-alternative-info  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2025-60480 · Severity: info · Published 2026-10-19

GPAC's MP4Box is a multimedia container tool used to process audio and video files. A heap buffer overflow in AC4 audio stream parsing allows an attacker to cause a denial of service by supplying a crafted malicious MP4 file, potentially crashing the application or enabling further code execution.

Technologies: [GPAC Project MP4Box](https://junglewise.ai/threats/technologies/gpac-project-mp4box). Vendors: [GPAC Project](https://junglewise.ai/threats/vendors/gpac-project).

## Quick answers

**Is CVE-2025-60480 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-60480 being exploited in the wild.

**How severe is CVE-2025-60480?** Informational severity, published 19 October 2026.

**Which products and versions are affected?** GPAC Project MP4Box 2.5-DEV-rev1593-gfe88c354 and earlier.

**Is there a fix for CVE-2025-60480?** Yes: fixed in Version after commit e02d1fd24cdc26acb1b236ab38b3832cffcae21b (2025-07-15). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-60480 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2025-60480?** Check whether you run GPAC Project MP4Box at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Version after commit e02d1fd24cdc26acb1b236ab38b3832cffcae21b (2025-07-15)

## Technical details

The gf_odf_ac4_cfg_alternative_info function in odf/descriptors.c performs insufficient bounds checking on alt_group_id array indices, leading to a heap buffer overflow when processing AC4 audio descriptor structures. An attacker can trigger this via a malformed AC4 file parsed by MP4Box; the vulnerability requires only the ability to provide input to the tool and causes denial of service with potential for code execution.

## Affected products

- GPAC Project MP4Box 2.5-DEV-rev1593-gfe88c354 and earlier

## Timeline

- 2025-10-19: disclosed
- 2025-07-15: patched: Commit e02d1fd fixing AC4 fuzzing issues

## References

- [https://github.com/gpac/gpac/commit/e02d1fd24cdc26acb1b236ab38b3832cffcae21b](https://github.com/gpac/gpac/commit/e02d1fd24cdc26acb1b236ab38b3832cffcae21b)
- [https://github.com/gpac/gpac/issues/3295](https://github.com/gpac/gpac/issues/3295)

## Related threats

- [GPAC MP4Box heap use-after-free in AC4 descriptor parsing](https://junglewise.ai/threats/cve-2025-60476-a-heap-use-after-free-in-the-gf-odf-ac4-cfg-clean-list-function)
- [GPAC MP4Box NULL pointer dereference in AC4 parser](https://junglewise.ai/threats/cve-2025-60469-a-null-pointer-dereference-in-the-gf-ac4-presentation-ch-mode)
- [GPAC MP4Box null pointer dereference in GetESD](https://junglewise.ai/threats/cve-2025-60497-a-segmentation-violation-in-the-getesd-function-isomedia-track-c)
- [GPAC MP4Box segmentation violation in check_media_profile](https://junglewise.ai/threats/cve-2025-60493-a-segmentation-violation-in-the-check-media-profile-function)
- [GPAC MP4Box stack overflow in BIFS scene decoder](https://junglewise.ai/threats/cve-2025-60492-a-stack-overflow-in-the-gf-bifs-dec-node-function-bifs-field)