CVE Catalog

CVE-2026-40573

HighCVSS 8.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.13%

3th percentile - higher than 3% of all known CVEs

Summary

NovumOS before version 0.25-beta.1 runs the Nova interpreter in Ring 0 with unrestricted kernel memory access. Loading a malicious .nv script through the shell allows a local user to execute code with kernel privileges without security checks. Script execution is not isolated in Ring 3.

Risk Assessment

A local user can gain full system control by executing code with kernel privileges. This leads to complete system compromise.

Recommendation

Update NovumOS to version 0.25-beta.1 or later. Avoid running untrusted .nv scripts.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS