Bug 2546594 (CVE-2026-105839)

Summary: CVE-2026-105839 libmikmod: libmikmod: Arbitrary code execution via integer overflow in Oktalyzer loader
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in libmikmod. An integer overflow in the Oktalyzer music module loader can result in a heap-based buffer overflow when parsing manipulated track counts. By tricking a user or application into processing a specially crafted audio file, an attacker could achieve arbitrary code execution or cause an application crash, resulting in a Denial of Service (DoS).
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2547393, 2547394    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-06 13:45:14 UTC 
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.