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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0013.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Konstanty Bialkowski libmodplug unaffected
Version Status Constraints
0 affected ≤ 0.8.9.1

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Project Subscriptions

Vendors Products
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Libmodplug Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Konstanty/libmodplug cve-icon cve-icon
https://github.com/Konstanty/libmodplug/blob/d1b97ed0020bc620a059d3675d1854b40bd2608d/src/load_ams.cpp#L509-L537 cve-icon cve-icon
https://hackmd.io/@haind-pwn/libmodplug-dsm-pattern-oob-write cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/libmodplug-through-0.8.9.1-heap-out-of-bounds-read-via-csoundfile-readams2 cve-icon cve-icon
History

Fri, 16 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 15 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
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.
Title libmodplug through 0.8.9.1 Heap Out-of-Bounds Read via CSoundFile::ReadAMS2
First Time appeared Konstanty Bialkowski
Konstanty Bialkowski libmodplug
Weaknesses CWE-125
CPEs cpe:2.3:a:konstanty_bialkowski:libmodplug:*:*:*:*:*:*:*:*
Vendors & Products Konstanty Bialkowski
Konstanty Bialkowski libmodplug
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-16T14:39:25.166Z

Reserved: 2026-10-15T19:33:19.766Z

Link: CVE-2026-111271

cve-icon Vulnrichment

Updated: 2026-10-16T14:38:45.771Z

cve-icon NVD

Status : Deferred

Published: 2026-10-15T22:19:27.957

Modified: 2026-10-16T18:25:45.343

Link: CVE-2026-111271

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T16:45:14Z

Weaknesses