CVE-2026-24875

Code execution via LHA header length underflow

Published Jan 27, 2026 · Updated Jan 27, 2026

Integer underflow in Modizer before 4.1.1 allows local users to corrupt heap memory by opening a crafted LHA archive. The bundled Lhasa decode_level3_header routine subtracts the base header size from a smaller attacker-controlled 32-bit level-3 header length, wrapping the allocation calculation. Exploitation requires user interaction with a malicious archive and can crash the player or enable code execution in its process.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in Modizer before 4.1.1 allows local users to corrupt heap memory by opening a crafted LHA archive. The bundled Lhasa decode_level3_header routine subtracts the base header size from a smaller attacker-controlled 32-bit level-3 header length, wrapping the allocation calculation. Exploitation requires user interaction with a malicious archive and can crash the player or enable code execution in its process.

The record

CVE
CVE-2026-24875
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
YoyoFR
Product
Modizer
Classifications
CWE-190, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.1.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

YoyoFR · Modizerversion=0 <4.1.1

Published CVSS scores

7.8GovTech CSGCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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