CVE-2026-111150
ValleyBell libvgm through commit a6eed945 Heap Out-of-Bounds Read via DecompressDataBlk
- State
- Published
- Severity
- 6.8 Medium
- Published
- Oct 15, 2026
- Updated
- Oct 21, 2026
- Reserved
- Oct 15, 2026
Description
ValleyBell libvgm through commit a6eed945 contains a heap out-of-bounds read vulnerability in the PCM data-block decompressor caused by an unbounded compression-table index. Attackers can supply a crafted .vgm file with a small type 0x7F table and wider compressed values, causing DecompressDataBlk to over-read heap memory and crash consumers.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
libvgmValleyBell |
|
References
- https://hackmd.io/@haind-pwn/libvgm-pcm-compression-table-oob-readtechnical-descriptionexploit
- https://github.com/ValleyBell/libvgm/blob/a6eed945ecf4e5a25cf82004779c6f7e4fd5c319/player/dblk_compr.c#L727-L751technical-description
- https://github.com/ValleyBell/libvgm/blob/a6eed945ecf4e5a25cf82004779c6f7e4fd5c319/player/dblk_compr.c#L183-L190technical-description
- https://github.com/ValleyBell/libvgmproduct
- VulnCheck Advisory: ValleyBell libvgm through commit a6eed945 Heap Out-of-Bounds Read via DecompressDataBlkthird-party-advisory
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