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NVD / CVE Program· CNA VulnCheck

CVE-2026-75904: libmodplug <= 0.8.9.1 - Out-of-Bounds Read in pat_smplooped via Crafted MIDI File

Noroxi assessment

Priority: Monitor (action score 19/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • Fixed version: libmodplug (Debian:14) 1:0.8.9.0-4; libmodplug (openSUSE:Leap 16.0) 0.8.9.0+git20170610.f6dd59a-bp160.2.1; libmodplug (openSUSE:Tumbleweed) 0.8.9.0+git20170610.f6dd59a-4.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to libmodplug (Debian:14) 1:0.8.9.0-4; libmodplug (openSUSE:Leap 16.0) 0.8.9.0+git20170610.f6dd59a-bp160.2.1; libmodplug (openSUSE:Tumbleweed) 0.8.9.0+git20170610.f6dd59a-4.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

libmodplug through 0.8.9.1 contains an out-of-bounds read in pat_smplooped in src/load_pat.cpp. The function validates only the upper bound of its sample index against MAXSMP and then subtracts one before indexing the 191-byte static array pat_loops, so an index of zero reads pat_loops[-1], one byte before the array. The index is the smpno field of a parsed MIDI event, which is initialised to zero and only later overwritten from a program-change parameter, so an event reaching the note test before an instrument is assigned carries zero. A 32-byte MIDI file supplied to the library's public ModPlug_Load entry point drives the path through CSoundFile::Create, CSoundFile::ReadMID, and MID_ReadPatterns to the read. The byte read out of bounds determines whether a note event is treated as looping, so adjacent static storage influences playback state.

MediumCVSS 4.8 · v4.0—No exploit Fix available
Published
Aug 18, 2026
Updated
Oct 22, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
4.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • Konstanty Bialkowski libmodplug

    • up to and including 0.8.9.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libmodplugfrom 0—
Debian:14libmodplugbefore 1:0.8.9.0-41:0.8.9.0-4
openSUSE:Leap 16.0libmodplugbefore 0.8.9.0+git20170610.f6dd59a-bp160.2.10.8.9.0+git20170610.f6dd59a-bp160.2.1
openSUSE:Tumbleweedlibmodplugbefore 0.8.9.0+git20170610.f6dd59a-4.10.8.9.0+git20170610.f6dd59a-4.1

Same product

konstanty bialkowski: all records

Other highest-scoring records for the same primary product.

  • CVE-2011-1574Stack-based buffer overflow in the ReadS3M method in load_s3m.cpp in libmodplug before 0.8.8.2 allows remote attackers to execute arbitrary
    40Plan
  • CVE-2009-1438Integer overflow in the CSoundFile::ReadMed function (src/load_med.cpp) in libmodplug before 0.8.6, as used in gstreamer-plugins, TTPlayer,
    31Monitor
  • CVE-2011-1761Multiple stack-based buffer overflows in the (1) abc_new_macro and (2) abc_new_umacro functions in src/load_abc.cpp in libmodplug before 0.8
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2013-4233Sep 16, 2013 · Integer overflow in the abc_set_parts function in load_abc.cpp in libmodplug 0.8.8.4 and earlier allows remote attackers to cause a denial o
    28Monitor
  • ← EarlierCVE-2013-4234Sep 16, 2013 · Multiple heap-based buffer overflows in the (1) abc_MIDI_drum and (2) abc_MIDI_gchord functions in load_abc.cpp in libmodplug 0.8.8.4 and ea
    28Monitor
  • Later →CVE-2026-108577Oct 11, 2026 · Konstanty Bialkowski libmodplug ABC Music Format load_abc.cpp abc_add_gchord resource consumption
    8Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:libmodplug1:0.8.9.0-4 · Debian:14Package registry (OSV)
opensuse:libmodplug0.8.9.0+git20170610.f6dd59a-4.1 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-11127158 days apartlibmodplug through 0.8.9.1 Heap Out-of-Bounds Read via CSoundFile::ReadAMS2
    27Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records