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CVE-2026-111150— ValleyBell libvgm through commit a6eed945 Heap Out-of-Bounds Read via DecompressDataBlk

Quick assessment

Affected
ValleyBell libvgm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ValleyBell libvgm 在 commit a6eed945 版本中，其 PCM 数据块解压模块存在一个堆越界读取漏洞，该漏洞由未受限制的压缩表索引引发。攻击者可构造一个特殊的 .vgm 文件，其中包含一个较小的类型为 0x7F 的表以及较宽的压缩值，从而导致 DecompressDataBlk 函数越界读取堆内存，并致使应用程序崩溃。

CVSS 5.5 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
ValleyBell libvgm ≤ a6eed945ecf4e5a25cf82004779c6f7e4fd5c319 affected
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I. Basic Information for CVE-2026-111150

Vulnerability Information
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Vulnerability Title
ValleyBell libvgm through commit a6eed945 Heap Out-of-Bounds Read via DecompressDataBlk
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ValleyBell libvgm 0 ~ a6eed945ecf4e5a25cf82004779c6f7e4fd5c319 -

II. Public POCs for CVE-2026-111150

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111150

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Vendor Advisories for CVE-2026-111150 (1)

Security Blog Posts for CVE-2026-111150 (1)

IV. Related Vulnerabilities

Same weakness: CWE-125

V. Comments for CVE-2026-111150

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