CVE-2026-40573
NovumOS: Nova Interpreter Privilege Escalation
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.
Fixes and workarounds
Fix
MinecAnton209/NovumOS (zig): GitHub reports patched versions >=0.25-beta.1. Check the advisory for the affected release branch.
Source: GitHub GHSA-rq9v-wxp3-ffrrAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| NovumOS MinecAnton209 |
< 0.25-beta.1 (affected) | CNA: GitHub_M |
MinecAnton209/NovumOSMinecAnton209/NovumOS
zig |
<=0.23 (affected, GitHub advisory range) | GitHub GHSA-rq9v-wxp3-ffrr |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.6 high |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H | CNA: GitHub_M |
| 3.1 / 8.6 high |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H | NVD: [email protected] |
Exploit evidence
- https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr
exploit · ADP: CISA-ADP
References
- https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrrCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207CNA: GitHub_M · x_refsource_MISC
- https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrrADP: CISA-ADP · exploit
- https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207[email protected]
- https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr[email protected]
- https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1[email protected]
- https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrrGitHub Security Advisories · advisory
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