# CVE-2026-111166: libmikmod heap out-of-bounds read in IMF_Load()

Source: https://junglewise.ai/threats/cve-2026-111166-libmikmod-through-3-3-15-contains-a-heap-out-of-bounds-read  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-15. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-111166 · Severity: medium · CVSS 5.5 · Published 2026-10-15

libmikmod is a music module playback library used in many applications to load and play various tracker music formats. A crafted IMF module file can trigger a heap read beyond allocated memory, causing the application to crash or potentially leak sensitive data from memory when the file is opened.

## Quick answers

**Is CVE-2026-111166 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111166 being exploited in the wild.

**How severe is CVE-2026-111166?** Medium severity, with a CVSS score of 5.5, published 15 October 2026.

**Which products and versions are affected?** Libmikmod through 3.3.15.

**Is there a fix for CVE-2026-111166?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-111166 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-111166?** Check whether you run Libmikmod at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The IMF_Load() function in libmikmod through version 3.3.15 fails to properly validate note indices when the linear-period header flag is set, allowing crafted module files to reference out-of-range sample indices. This leads to heap out-of-bounds reads when the loader dereferences these invalid indices, enabling memory disclosure or application denial of service.

## Affected products

- libmikmod through 3.3.15

## Timeline

- 2026-10-15: disclosed

## References

- [https://github.com/](https://github.com/)
- [https://github.com/sezero/mikmod](https://github.com/sezero/mikmod)