CVE-2026-40573 (GCVE-0-2026-40573)

Vulnerability from cvelistv5 – Published: 2026-10-30 20:31 – Updated: 2026-10-30 20:31
VLAI
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 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.
Severity
8.6 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
  • CWE-250 - Execution with Unnecessary Privileges
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8035 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
MinecAnton209 NovumOS Affected: < 0.25-beta.1
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "NovumOS",
          "vendor": "MinecAnton209",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.25-beta.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-250: Execution with Unnecessary Privileges",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T20:31:13.209Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr"
        },
        {
          "name": "https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207",
          "tags": [
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          ],
          "url": "https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207"
        },
        {
          "name": "https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1"
        }
      ],
      "source": {
        "advisory": "GHSA-rq9v-wxp3-ffrr",
        "discovery": "UNKNOWN"
      },
      "title": "NovumOS: Nova Interpreter Privilege Escalation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-40573",
    "datePublished": "2026-10-30T20:31:13.209Z",
    "dateReserved": "2026-04-14T13:24:29.474Z",
    "dateUpdated": "2026-10-30T20:31:13.209Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-40573",
      "date": "2026-11-01",
      "epss": "0.00129",
      "percentile": "0.02533"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "NovumOS",
                "vendor": "MinecAnton209",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 0.25-beta.1"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          }
        ],
        "id": "CVE-2026-40573",
        "lastModified": "2026-10-30T21:16:53.670",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 8.6,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
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        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/MinecAnton209/NovumOS/commit/ca3e7a6b4bcdcac23413d39ecf863b94e6a3a207"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rq9v-wxp3-ffrr"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/MinecAnton209/NovumOS/tree/v0.25-beta.1"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-250"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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