---
id: CVE-2026-111150
title: >-
  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
summary: >-
  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…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
vendor: ValleyBell
product: libvgm
affected:
  - libvgm <= a6eed945ecf4e5a25cf82004779c6f7e4fd5c319
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:29.650'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111150'
references:
  - url: 'https://github.com/ValleyBell/libvgm'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ValleyBell/libvgm/blob/a6eed945ecf4e5a25cf82004779c6f7e4fd5c319/player/dblk_compr.c#L183-L190
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ValleyBell/libvgm/blob/a6eed945ecf4e5a25cf82004779c6f7e4fd5c319/player/dblk_compr.c#L727-L751
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/libvgm-pcm-compression-table-oob-read'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/valleybell-libvgm-through-commit-a6eed945-heap-out-of-bounds-read-via-decompressdatablk
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T19:25:46.415Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.