CVE-2026-111154: Sezero Libtimidity

Medium severity, CVSS 6.1. EPSS: 0.1% chance of exploitation in the next 30 days.

libTiMidity through 0.2.8 contains a stack out-of-bounds write vulnerability in the SoundFont loader that allows attackers to corrupt stack memory via unchecked generator operators in parse_gen. Attackers can supply a crafted .sf2 file with out-of-range pgen/igen operator values to write chosen 16-bit values near the stack Layer object, causing crashes and stack memory corruption.

Affected products

• Sezero Libtimidity: from 0.2.8, up to and including 0.2.8

Published 2026-10-15. Last modified 2026-10-16.