---
id: CVE-2026-112009
title: 'smpeg through 2.0.0 Heap Out-of-Bounds Read via MPEGsystem::FillBuffer'
summary: >-
  smpeg through 2.0.0 contains a heap out-of-bounds read vulnerability in
  MPEGsystem::FillBuffer() that allows attackers to read past the 16384-byte
  buffer by supplying a crafted system header stream table. Attackers can
  provide an MPEG fi…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-125
vendor: icculus
product: smpeg
affected:
  - smpeg <= 2.0.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-18T12:17:03.445754Z'
exploitAvailable: true
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T12:23:31.861Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112009'
references:
  - url: 'https://hackmd.io/@haindpwn/smpeg-system-header-stream-table-oob-read'
  - url: >-
      https://github.com/icculus/smpeg/blob/d188dc111f4817288718705e4a84e248803ccfdc/MPEGsystem.cpp#L803-L823
  - url: 'https://github.com/icculus/smpeg'
  - url: >-
      https://www.vulncheck.com/advisories/smpeg-through-2.0.0-heap-out-of-bounds-read-via-mpegsystem-fillbuffer
    label: >-
      VulnCheck Advisory: smpeg through 2.0.0 Heap Out-of-Bounds Read via
      MPEGsystem::FillBuffer
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-10-18T11:40:26.624Z'
---

## Overview

smpeg through 2.0.0 contains a heap out-of-bounds read vulnerability in MPEGsystem::FillBuffer() that allows attackers to read past the 16384-byte buffer by supplying a crafted system header stream table. Attackers can provide an MPEG file whose stream table bytes all set the high bit, which crashes applications opening it through SMPEG_new, SMPEG_new_rwops, or SMPEG_new_data.

## Affected

- `smpeg <= 2.0.0`

## Remediation

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