CVE-2023-24287

Crash via unchecked Undead M command

Published Sep 14, 2026 · Updated Sep 14, 2026

Buffer overflow in the Undead puzzle before 20230116.5782e29 allows attackers to crash Simon Tatham's Portable Puzzle Collection. The execute_move routine accepts an M command from loaded save-file history and writes beyond its monster-position buffer without sufficient bounds validation. Local users must open a crafted save file; the documented consequence is a process crash, not code execution.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in the Undead puzzle before 20230116.5782e29 allows attackers to crash Simon Tatham's Portable Puzzle Collection. The execute_move routine accepts an M command from loaded save-file history and writes beyond its monster-position buffer without sufficient bounds validation. Local users must open a crafted save file; the documented consequence is a process crash, not code execution.

The record

CVE
CVE-2023-24287
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  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

6.8TenableCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo