CVE-2026-105839 libmikmod before 3.3.14 Heap Buffer Overflow via OKT Loader OKT_doPBOD
Attackers can trigger heap buffer overflow and potential code execution in libmikmod via crafted OKT module files exploiting an integer overflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-105839?
CVE-2026-105839 is a high-severity vulnerability in sezero libmikmod, published on 6 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2026-105839?
How do I fix CVE-2026-105839?
Upgrade to a fixed version.
Is CVE-2026-105839 being exploited?
There is no known exploitation of CVE-2026-105839 in the wild and no public exploit code.
Sources
Also known as AZL-106658, DEBIAN-CVE-2026-105839, GHSA-w386-36c3-r8wv, UBUNTU-CVE-2026-105839.