---
id: CVE-2026-111157
title: >-
  SoX through 14.4.2 contains a heap out-of-bounds write vulnerability in
  lsx_ms_adpcm_block_expand_i() in src/adpcm.c, triggered by an odd
  samplesPerBlock value in the WAV fmt chunk
summary: >-
  SoX through 14.4.2 contains a heap out-of-bounds write vulnerability in
  lsx_ms_adpcm_block_expand_i() in src/adpcm.c, triggered by an odd
  samplesPerBlock value in the WAV fmt chunk. Attackers can supply a crafted MS
  ADPCM WAV file to sox…
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'
cwe:
  - CWE-787
vendor: SoX
product: sox
affected:
  - sox <= 14.4.2
published: '2026-10-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:17:35.790'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111157'
references:
  - url: >-
      https://github.com/chirlu/sox/blob/42b3557e13e0fe01a83465b672d89faddbe65f49/src/adpcm.c#L144-L166
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/chirlu/sox/blob/42b3557e13e0fe01a83465b672d89faddbe65f49/src/wav.c#L250-L251
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/sox-wav-ms-adpcm-samplesperblock-oob-write'
    label: disclosure@vulncheck.com
  - url: 'https://sourceforge.net/projects/sox/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sox-through-14.4.2-heap-out-of-bounds-write-via-ms-adpcm-wav-decoding
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111157.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-111157'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2553751'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-111157'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111157'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - exploit-available
epss: 0.00128
epssPercentile: 0.02422
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T16:28:13.719712Z'
ingestedAt: '2026-10-15T19:25:46.417Z'
---

## Overview

SoX through 14.4.2 contains a heap out-of-bounds write vulnerability in lsx_ms_adpcm_block_expand_i() in src/adpcm.c, triggered by an odd samplesPerBlock value in the WAV fmt chunk. Attackers can supply a crafted MS ADPCM WAV file to sox or any libsox consumer to write a partially controlled 16-bit sample past the heap buffer allocated by wav_ms_adpcm_fmt().

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-111157.json)