PT-2026-33549 · Minecanton209 · Novumos

Published 2026-04-18 · Updated 2026-04-18 · CVE-2026-40572

Mitre

CVSS v3.1

9.0

Critical

AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

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.

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-40572

Affected Products

Novumos

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-40572 · Security Note
• https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rg7m-6vh7-f4v2 · Note
• https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24 · Note