CVE-2026-105839
Deferred Deferred - Pending Action

Integer Overflow in libmikmod Leading to Heap Buffer Overflow

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: VulnCheck

Description
libmikmod before 3.3.14 contains an integer overflow in the Oktalyzer loader OKT_doPBOD() that allows attackers to cause heap buffer overflow via crafted track counts. Attackers can supply an OKT module whose SLEN chunk wraps the 16-bit numtrk value, causing PBOD writes past allocated track pointers for crashes or code execution.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-105839
EUVD
EUVD-2026-93391

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
sezero libmikmod 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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Executive Summary

libmikmod before 3.3.14 has an integer overflow in the Oktalyzer loader OKT_doPBOD() function. Attackers can exploit this by providing an OKT module with a SLEN chunk that wraps the 16-bit numtrk value, causing the track count to overflow. This leads to heap buffer overflow when writing PBOD data past allocated track pointers, potentially causing crashes or arbitrary code execution.

Detection Guidance

This vulnerability affects libmikmod versions before 3.3.14. To detect it, check the installed version of libmikmod using commands like 'dpkg -l libmikmod3' on Debian-based systems or 'rpm -qa | grep libmikmod' on RPM-based systems. If the version is below 3.3.14, the system is vulnerable.

Impact Analysis

If you use libmikmod before 3.3.14 to process untrusted OKT audio modules, an attacker could craft a malicious file to crash your application or execute arbitrary code on your system. This could lead to data loss, system compromise, or unauthorized access depending on the context of use.

Compliance Impact

This vulnerability could impact compliance by enabling unauthorized code execution or data access if exploited. For GDPR, it may lead to data breaches requiring notification. For HIPAA, it could compromise protected health information integrity. Organizations must ensure affected software is patched to maintain compliance.

Mitigation Strategies

Immediately update libmikmod to version 3.3.14 or later. On Debian/Ubuntu, use 'sudo apt update && sudo apt upgrade libmikmod3'. On RPM-based systems, use 'sudo yum update libmikmod' or 'sudo dnf upgrade libmikmod'. Avoid using untrusted OKT audio modules until patched.

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