EUVD-2026-23640
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Lifecycle Timeline
4DescriptionNVD
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.
AnalysisAI
Local privilege escalation in NovumOS <0.24 allows unprivileged processes to overwrite kernel interrupt handlers through unchecked memory mapping. Syscall 15 (MemoryMapRange) fails to validate user-requested virtual address ranges against protected kernel regions (IDT, GDT, TSS, page tables), enabling ring 3 to ring 0 escalation. …
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RemediationAI
Within 24 hours: Identify all systems running NovumOS <0.24 and isolate from production networks or restrict local access. Within 7 days: Test NovumOS v0.24 or later in staging environment for compatibility. …
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External POC / Exploit Code
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