CVE ID :CVE-2026-40572 Published : April 18, 2026, 1:16 a.m. | 2 hours, 17 minutes ago 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. Severity: 9.0 | CRITICAL Visit the link for more details, such as CVSS details, affected products, timeline, and more...