diasurgical DevilutionX up to 1.5.5 libmpq libmpq__archive_dup heap-based overflow

Summaryinfo

A vulnerability described as critical has been identified in diasurgical DevilutionX up to 1.5.5. The affected element is the function libmpq__archive_dup of the component libmpq. The manipulation results in heap-based overflow. This vulnerability is identified as CVE-2026-116842. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in diasurgical DevilutionX up to 1.5.5. Affected is the function libmpq__archive_dup of the component libmpq. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-116842 since 10/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/27/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• diasurgical

Name

• DevilutionX

Version

• 1.5.0
• 1.5.1
• 1.5.2
• 1.5.3
• 1.5.4
• 1.5.5

Website

• Product: https://github.com/diasurgical/DevilutionX/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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