CVE-2026-40572
CRITICAL
INFO
Priority: 0.02
BB Relevance:
53/100
Published: 2026-04-18
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
Scope Change
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
None
UI:
None
S:
Changed
C:
High
I:
High
A:
None
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.
Weakness Classification (1)
Affected Software (1)
| Vendor | Product | Version |
|---|---|---|
| minecanton209 | novumos | < 0.24 |
References & Advisories (2)
Release Notes
Exploit
Vendor Advisory