Executive brief
vgmstream is an open-source library used to play audio files from video games. The library contains a buffer overflow vulnerability in its EA SCHl audio format parser that could allow an attacker to write data beyond allocated memory boundaries when processing crafted audio files. This could lead to application crashes or potentially arbitrary code execution.
Technical details
The vulnerability is an out-of-bounds write flaw in the vadpcm_read_coefs_be function within the EA SCHl parser component of vgmstream (affecting versions up to r2117). The vulnerable code in src/coding/vadpcm_decoder.c improperly validates or bounds-checks function arguments before writing to a buffer, allowing an attacker-controlled input to write beyond allocated memory. Remote exploitation is possible by providing a crafted audio file that triggers the buffer overflow. The patch (commit ae37662ad626254ddd96ad69ac263792d7a92024) addresses buffer and integer overflow issues in the parsing logic. Users should update vgmstream to a version that includes this commit or later.
Affected products
- vgmstream vgmstream up to r2117
Timeline
- 2026-09-17: disclosed
- 2026-08-23: patched: Fix committed as ae37662ad626254ddd96ad69ac263792d7a92024