DevilutionX 1.4.0 through 1.5.5 contains a heap buffer overflow vulnerability in the bundled libmpq libmpq__archive_dup routine when opening crafted MPQ archives. Attackers can supply an MPQ archive whose block table count exceeds its hash table count, causing memcpy to overflow the heap during startup and crash the game.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

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 Low

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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

Vendor Product Default status Versions
diasurgical DevilutionX unaffected
Version Status Constraints
1.4.0 affected ≤ 1.5.5

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Project Subscriptions

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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/diasurgical/DevilutionX/blob/7223eeac9e8274fbf665b4de86fda26d3b22c52f/3rdParty/libmpq/CMakeLists.txt cve-icon cve-icon
https://github.com/diasurgical/DevilutionX/issues/8758 cve-icon cve-icon
https://github.com/diasurgical/DevilutionX/pull/8482 cve-icon cve-icon
https://github.com/diasurgical/libmpq/blob/b78d66c6fee6a501cc9b95d8556a129c68841b05/libmpq/mpq.c#L505 cve-icon cve-icon
https://hackmd.io/@haindpwn/devilutionx-libmpq-hash-block-table-oob cve-icon cve-icon
https://www.vulncheck.com/advisories/devilutionx-1.4.0-through-1.5.5-heap-buffer-overflow-via-libmpq-archive-dup cve-icon cve-icon
History

Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Description DevilutionX 1.4.0 through 1.5.5 contains a heap buffer overflow vulnerability in the bundled libmpq libmpq__archive_dup routine when opening crafted MPQ archives. Attackers can supply an MPQ archive whose block table count exceeds its hash table count, causing memcpy to overflow the heap during startup and crash the game.
Title DevilutionX 1.4.0 through 1.5.5 Heap Buffer Overflow via libmpq__archive_dup
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-27T00:34:01.167Z

Reserved: 2026-10-27T00:10:22.758Z

Link: CVE-2026-116842

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-27T01:19:07.573

Modified: 2026-10-27T01:19:07.573

Link: CVE-2026-116842

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T07:30:15Z

Weaknesses