{"id":"CVE-2026-40573","title":"NovumOS: Nova Interpreter Privilege Escalation","summary":"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 p…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-250"],"vendor":"MinecAnton209","product":"NovumOS","affected":["NovumOS < 0.25-beta.1"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-11-05T02:45:57.465546Z"},"exploitAvailable":true,"published":"2026-10-30","updated":"2026-11-05","sourceUpdated":"2026-11-05T02:46:22.700Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-40573","references":[{"url":"https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr","label":"https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr"},{"url":"https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207","label":"https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207"},{"url":"https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1","label":"https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1"}],"tags":["cve.org","exploit-available"],"epss":0.00129,"epssPercentile":0.02572,"ingestedAt":"2026-11-05T21:36:00.714Z","slug":"CVE-2026-40573","body":"## Overview\n\nNovumOS 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.\n\n## Affected\n\n- `NovumOS < 0.25-beta.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":59,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}