Critical Severity Vulnerability
This vulnerability has been rated as Critical severity. Immediate action is recommended.
CVE-2026-40572
CriticalVulnerability 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.
CVSS Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Severity Details
Weakness Type (CWE)
Improper Privilege Management
- Description
- The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
- Exploit Likelihood
- Medium
- Typical Severity
- High
- OWASP Top 10
- A01:2021-Broken Access Control
- Abstraction Level
- Class
Key Information
- Published Date
- April 18, 2026
