Vulnerability in Minecanton209 Novumos
CVE-2026-40573
NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. Prior to version 0.25-beta.1, the `Nova` interpreter runs in Ring 0 with unrestricted kernel-memory access. Loading a malicious `.nv` script through the shell permits a local user to execute code with kernel privileges without security checks. The advisory identifies VM initialization in `zig/nova/vm.zig` as the affected component; script execution is not isolated in a restricted Ring 3 privilege domain. This issue is fixed in version 0.25-beta.1.
Published .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Minecanton209 Novumos — versions < 0.25-beta.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-40573?
- CVE-2026-40573 is a high-severity vulnerability in Minecanton209 Novumos, classified under CWE-250. CVSS score: 8.6/10. Published 2026-10-30.
- How severe is CVE-2026-40573?
- High severity. CVSS v3 base score is 8.6 out of 10.