---
id: CVE-2026-40573
title: 'NovumOS: Nova Interpreter Privilege Escalation'
summary: >-
  NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly.
  Prior to version 0.25-beta.1, the `Nova` interpreter runs in Ring 0 with
  unrestricted kernel-memory access. Loading a malicious `.nv` script through
  the shell p…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-250
vendor: MinecAnton209
product: NovumOS
affected:
  - NovumOS < 0.25-beta.1
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-05T02:45:57.465546Z'
exploitAvailable: true
published: '2026-10-30'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T02:46:22.700Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-40573'
references:
  - url: >-
      https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr
    label: >-
      https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr
  - url: >-
      https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207
    label: >-
      https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207
  - url: 'https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1'
    label: 'https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1'
tags:
  - cve.org
  - exploit-available
epss: 0.00129
epssPercentile: 0.02572
ingestedAt: '2026-11-05T21:36:00.714Z'
---

## Overview

NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. Prior to version 0.25-beta.1, the `Nova` interpreter runs in Ring 0 with unrestricted kernel-memory access. Loading a malicious `.nv` script through the shell permits a local user to execute code with kernel privileges without security checks. The advisory identifies VM initialization in `zig/nova/vm.zig` as the affected component; script execution is not isolated in a restricted Ring 3 privilege domain. This issue is fixed in version 0.25-beta.1.

## Affected

- `NovumOS < 0.25-beta.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.