---
id: CVE-2026-88377
title: >-
  Bento4 1.6.0.0 contains an integer underflow vulnerability in the avcC and
  hvcC configuration atom parsers
summary: >-
  Bento4 1.6.0.0 contains an integer underflow vulnerability in the avcC and
  hvcC configuration atom parsers. A specially crafted MP4 file containing an
  atom with a declared size smaller than AP4_ATOM_HEADER_SIZE can cause
  AP4_AvccAtom::Cr…
severity: none
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:08:55.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88377'
references:
  - url: 'https://github.com/axiomatic-systems/Bento4/issues/1092'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.849Z'
epss: 0.00149
epssPercentile: 0.03447
---

## Overview

Bento4 1.6.0.0 contains an integer underflow vulnerability in the avcC and hvcC configuration atom parsers. A specially crafted MP4 file containing an atom with a declared size smaller than AP4_ATOM_HEADER_SIZE can cause AP4_AvccAtom::Create() or AP4_HvccAtom::Create() to underflow the payload-size calculation. The resulting oversized buffer operation can cause invalid or NULL pointers to be passed to the AP4_DataBuffer copy path, resulting in application termination and denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.