What’s Vulnerable › Vulnerabilities

CVE-2026-40572: NovumOS has Arbitrary Memory Mapping via Syscall 15 (MemoryMapRange)

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-18 · updated 2026-10-26
• Weakness: CWE-269

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.

Affected products

• MinecAnton209 NovumOS: before 0.24 — fixed in 0.24

How to fix

Upgrade to a fixed version: MinecAnton209 NovumOS 0.24. Check the vendor advisory for mitigations.

References

• https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24
• https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rg7m-6vh7-f4v2

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