Executive brief
vgmstream is a widely-used audio library for playing streamed game audio formats. A malformed MUS audio file can trigger excessive resource consumption during parsing, potentially causing the application using vgmstream to become unresponsive or crash, impacting availability of systems that depend on vgmstream for audio playback.
Technical details
The vulnerability is a resource exhaustion / denial of service flaw in the parse_mus function within src/meta/mus_acm.c of vgmstream up to revision r2117. The issue involves improper buffer and integer handling that can lead to unbounded resource consumption when processing specially-crafted MUS audio files. The attack requires network delivery of a malicious file and user interaction to open it, but no authentication is required. An attacker can cause a denial of service by exhausting CPU or memory resources. The patch (commit ae37662ad626254ddd96ad69ac263792d7a92024) addresses buffer overflow and integer overflow issues in the parsing logic.
Affected products
- vgmstream vgmstream up to r2117
Timeline
- 2026-09-17: disclosed
- 2026-08-23: patched: Patch commit ae37662ad626254ddd96ad69ac263792d7a92024