Vulnerability in Zdoom Gzdoom
CVE-2025-54065
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.
EPSS: 0.001 (2.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Zdoom Gzdoom — versions <= 4.14.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2025-54065?
- CVE-2025-54065 is a high-severity vulnerability in Zdoom Gzdoom, classified under Improper Control of Dynamically-Managed Code Resources. CVSS score: 7.9/10. Published 2025-12-03.
- How severe is CVE-2025-54065?
- High severity. CVSS v3 base score is 7.9 out of 10.