BaseFortify

Publication date: 2025-12-03

Last updated on: 2025-12-04

Assigner: GitHub, Inc.

Description

GZDoom is a feature centric port for all Doom engine games. GZDoom is an open source Doom engine. In versions 4.14.2 and earlier, ZScript actor state handling allows scripts to read arbitrary addresses, write constants into the JIT-compiled code section, and redirect control flow through crafted FState and VMFunction structures. A script can copy FState structures into a writable buffer, modify function pointers and state transitions, and cause execution of attacker-controlled bytecode, leading to arbitrary code execution.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-03

Last Modified

2025-12-04

Generated

2026-07-06

AI Q&A

2025-12-03

EPSS Evaluated

2026-07-05

NVD

CVE-2025-54065

EUVD

EUVD-2025-201101

Affected Vendors & Products

Vendor	Product	Version / Range
zdoom	gzdoom	4.14.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-913	The product does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements.

Attack-Flow Graph

Executive Summary

This vulnerability in GZDoom versions 4.14.2 and earlier involves the ZScript actor state handling, which allows malicious scripts to read arbitrary memory addresses, write constants into the JIT-compiled code section, and redirect control flow by manipulating crafted FState and VMFunction structures. This manipulation can lead to execution of attacker-controlled bytecode, resulting in arbitrary code execution.

Impact Analysis

The vulnerability can allow an attacker with limited privileges to execute arbitrary code within the GZDoom environment. This could lead to unauthorized actions such as compromising the system running GZDoom, executing malicious payloads, or disrupting normal operation.

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