Out-of-bounds Read in Sezero Libmikmod
CVE-2026-111166
libmikmod through 3.3.15 contains a heap out-of-bounds read vulnerability in the IMF_Load() loader that allows attackers to read beyond allocated memory by supplying a crafted IMF module. Attackers can enable the linear-period header flag and map notes to out-of-range samples, causing noteindex indexing far past the heap allocation and crashing applications that load the file.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/libmikmod-mtm-imf-loader-oob-read (technical-description)
- github.com/sezero/mikmod/blob/6e658155f7e6b394a288dac796ba572634553fad/libmikmo… (technical-description)
- github.com/sezero/mikmod (product)
- www.vulncheck.com/advisories/libmikmod-through-3.3.15-heap-out-of-bounds-read-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111166?
- CVE-2026-111166 is a medium-severity vulnerability in Sezero Libmikmod, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-10-15.
- How severe is CVE-2026-111166?
- Medium severity. CVSS v3 base score is 5.5 out of 10.