Heap Out-of-Bounds Write Vulnerability in SoX Software by SoX Project
CVE-2026-111157

6.9MEDIUM

Key Information:

Vendor

Sox

Status
Sox
Vendor
CVE Published:
15 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-111157?

SoX versions up to 14.4.2 are susceptible to a heap out-of-bounds write vulnerability located in the function lsx_ms_adpcm_block_expand_i() within the file src/adpcm.c. This issue arises from the processing of WAV files with an anomalous samplesPerBlock value in the fmt chunk. Attackers can exploit this vulnerability by providing a specially crafted MS ADPCM WAV file to SoX or any application utilizing the libsox library, enabling them to write a controlled 16-bit sample beyond the allocated heap buffer, potentially leading to arbitrary code execution.

Affected Version(s)

sox 0 <= 14.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-111157 - Proof of Concept

References

https://hackmd.io/@haind-pwn/sox-wav-ms-adpcm-samplesperb...
technical-descriptionexploit
https://github.com/chirlu/sox/blob/42b3557e13e0fe01a83465...
technical-description
https://github.com/chirlu/sox/blob/42b3557e13e0fe01a83465...
technical-description

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.