CVE-2026-40572 | BDVDB-2026-327650 Detail

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.

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History#

1. Version 12026-04-18Record published in the CVE List.
2. Version 22026-04-20Most recent update recorded in the CVE List.