CVE-2026-40572
Critical
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.
SeverityCritical
CVSS9.0
Exploit probability—
ProductMinecanton209 Novumos
PublishedApr 18, 2026
First seenApr 18, 2026
Weakness typeCWE-269Improper privilege management
How to fix
Update
- minecanton209 novumos0.24 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| minecanton209 novumos | v < 0.24 | 0.24 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.