How severe is CVE-2026-40572?

CVE-2026-40572 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-40572 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40572?

CVE-2026-40572 affects Minecanton209 Novumos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40572?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-40572 have an EU (EUVD) identifier?

Yes. CVE-2026-40572 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23640.

When was CVE-2026-40572 published?

CVE-2026-40572 was published on 2026-04-18 and last updated on 2026-06-17.

CVE-2026-40572

CVE-2026-40572 is a critical-severity vulnerability in Minecanton209 Novumos with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23640
Weakness: CWE-269
Affected product: Minecanton209 Novumos
Published: 2026-04-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40572?: 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.
How severe is CVE-2026-40572?: CVE-2026-40572 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-40572 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40572?: CVE-2026-40572 affects Minecanton209 Novumos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40572?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-40572 have an EU (EUVD) identifier?: Yes. CVE-2026-40572 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23640.
When was CVE-2026-40572 published?: CVE-2026-40572 was published on 2026-04-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:minecanton209:novumos:*:*:*:*:*:*:*:*

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