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CVE-2026-111271— libmodplug through 0.8.9.1 Heap Out-of-Bounds Read via CSoundFile::ReadAMS2

Quick assessment

Affected
Konstanty Bialkowski libmodplug
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.

libmodplug 在 0.8.9.1 及更早版本中存在一个基于堆的越界读取漏洞，该漏洞位于 src/load_ams.cpp 文件中的 CSoundFile::ReadAMS2() 函数。攻击者可以通过构造恶意 AMS 文件，读取相邻的堆内存数据。具体来说，攻击者可以提供一种 AMS 模块，其中模式效果字节始终将第 7 位保持为设置状态，从而驱动解码器越过输入缓冲区边界，导致任何使用 libmodplug 的应用程序崩溃。

CVSS 5.5 · Medium
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I. Basic Information for CVE-2026-111271

Vulnerability Information
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Vulnerability Title
libmodplug through 0.8.9.1 Heap Out-of-Bounds Read via CSoundFile::ReadAMS2
Source: CVE Program / CVE List V5
Vulnerability Description
libmodplug through 0.8.9.1 contains a heap-based out-of-bounds read vulnerability in CSoundFile::ReadAMS2() in src/load_ams.cpp that allows attackers to read adjacent heap memory via crafted AMS files. Attackers can supply an AMS module whose pattern effect bytes keep bit 7 set, driving the decoder past the input buffer and crashing any libmodplug consumer.
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
Konstanty Bialkowski libmodplug 0 ~ 0.8.9.1 -

II. Public POCs for CVE-2026-111271

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III. Intelligence Information for CVE-2026-111271

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Patches & Fixes for CVE-2026-111271 (1)

Vendor Advisories for CVE-2026-111271 (1)

Proof of Concept for CVE-2026-111271 (1)

Other References for CVE-2026-111271 (1)

IV. Related Vulnerabilities

Same product: libmodplug
Same vendor: Konstanty Bialkowski
Same weakness: CWE-125

V. Comments for CVE-2026-111271

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