# CVE-2026-40572

> Vulnerability · severity: **CRITICAL** (CVSS 9).

## Description

NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. In versions prior to 0.24, Syscall 15 (MemoryMapRange) allows Ring 3 user-mode processes to map arbitrary virtual address ranges into their address space without validating against forbidden regions, including critical kernel structures such as the IDT, GDT, TSS, and page tables. A local attacker can exploit this to modify kernel interrupt handlers, resulting in privilege escalation from user mode to kernel context. This issue has been fixed in version 0.24.

## Key facts

- **CVE ID:** CVE-2026-40572
- **Published:** 2026-04-18
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9
- **CWE codes:** CWE-269

## Affected products

- `minecanton209:novumos`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40572

## Citation

> AI Analytics. CVE-2026-40572. Retrieved 2026-08-12 from https://api.ai-analytics.org/cve/CVE-2026-40572. Derived from NIST NVD. Licensed CC0.

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