CVE-2023-24286

Memory corruption via malformed Mosaic game description

Published Sep 14, 2026 · Updated Sep 14, 2026

Buffer overflow in Simon Tatham's Portable Puzzle Collection before 20230116.5782e29 allows attackers to corrupt memory via a Mosaic save file. The Mosaic game-description loader accepts malformed description data from the file and writes beyond the destination buffer while decoding it. Exploitation requires a user to open the supplied file or description; public records do not establish a consequence beyond process-memory corruption.

CVSS severity7.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Simon Tatham's Portable Puzzle Collection before 20230116.5782e29 allows attackers to corrupt memory via a Mosaic save file. The Mosaic game-description loader accepts malformed description data from the file and writes beyond the destination buffer while decoding it. Exploitation requires a user to open the supplied file or description; public records do not establish a consequence beyond process-memory corruption.

The record

CVE
CVE-2023-24286
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Simon Tatham
Product
Simon Tatham's Portable Puzzle Collection
Classifications
T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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?

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  1. Affected versionversion=0 <20230116.5782e29

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Simon Tatham · Simon Tatham's Portable Puzzle Collectionversion=0 <20230116.5782e29

Published CVSS scores

7.8TenableCVSS:3.0/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

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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

T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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