CVE-2026-40572: NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. In versions prior to 0.24, Syscall 15…
CVE-2026-40572 · Severity: critical · CVSS 9 · Published 2026-04-18
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-40572 being exploited in the wild.
How severe is CVE-2026-40572?
Critical severity, with a CVSS score of 9, published 18 April 2026.
Which products and versions are affected?
Minecanton209 Novumos. The advisory does not name versions.
Is there a fix for CVE-2026-40572?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-40572?
Check whether you run Minecanton209 Novumos. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.