CVE-2025-55640: Heap Buffer Overflow in GPAC/MP4Box via stbl_AddSize on crafted MP4 with corrupted sample metadata

Published Oct 16, 2026

Updated

A heap buffer overflow in the stblAddSize function (isomedia/stblwrite.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

Affected Software

8 affected components

Gpac MP4Box=2.4

ubuntu/gpac*

debian/gpac

Event History

Oct 16, 2026

CVE Published

via MITRE·12:00 AM

Data Sourced

via MITRE·12:00 AM

Description

Data Sourced

via OSV·12:00 AM

DescriptionSeverity

Data Sourced

via Ubuntu·12:00 AM

RemedyDescriptionSeverityAffected Software

Data Sourced

via OSV·07:16 PM

Affected Software

Data Sourced

via NVD·07:16 PM

DescriptionSeverityWeakness

Company

Resources

Contact

SecAlerts Pty Ltd.
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Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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