CVE-2026-111270 libmodplug through 0.8.9.1 Heap Out-of-Bounds Write via CSoundFile::ReadDSM
Attackers can cause heap corruption and potential code execution by providing a crafted DSM file to applications using libmodplug.
- 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-2026-111270?
CVE-2026-111270 is a medium-severity memory corruption vulnerability in Konstanty Bialkowski libmodplug, published on 15 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
libmodplug through 0.8.9.1 contains a heap-based out-of-bounds write in CSoundFile::ReadDSM() in src/load_dsm.cpp because nPat is never checked against MAX_PATTERNS. Attackers can supply a crafted DSM file with over 240 PATT chunks or a wrapping patt_len value to corrupt heap memory and crash the consuming process.
Weakness: CWE-787
Which versions are affected by CVE-2026-111270?
How do I fix CVE-2026-111270?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-111270 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111270 exists.
Sources
Also known as AZL-110351, DEBIAN-CVE-2026-111270, ECHO-d378-2d1f-97fb, GHSA-rxvf-jg5h-5fv5, UBUNTU-CVE-2026-111270.