NovumOS has Arbitrary Memory Mapping via Syscall 15 (MemoryMapRange)

{
  "id": "e1788062f5c83f14cdc200398f5683e69866fcee60684dcf4cd2cc26594438c4",
  "url": "https://osv.dev/vulnerability/CVE-2026-40572",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "NovumOS has Arbitrary Memory Mapping via Syscall 15 (MemoryMapRange)",
    "summary": "NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. In versions prior to 0.24, Syscall 15 (MemoryMapRange) allows Ring 3 user-mode processes to map arbitrary virtual address ranges into their address space without validating against forbidden regions, including critical kernel structures such as the IDT, GDT, TSS, and page tables. A local attacker can exploit this to modify kernel interrupt handlers, resulting in privilege escalation from user mode to kernel context. This issue has been fixed in version 0.24.",
    "evidence": "osv:CVE-2026-40572",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-40572",
      "aliases": [
        "CVE-2026-40572",
        "GHSA-rg7m-6vh7-f4v2"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/minecanton209/novumos",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2fd365cd7c483ddf552de0ce81906eb05bb92bea"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.24"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2fd365cd7c483ddf552de0ce81906eb05bb92bea"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.24"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.23",
            "v0.23-beta.6",
            "v0.23-beta.5",
            "v0.23-beta.4",
            "v0.23-beta.3",
            "v0.23-beta.2",
            "v0.21",
            "v0.20.1",
            "v0.20"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40572.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.318714969Z",
      "provider": "osv",
      "references": [
        "https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40572.json",
        "https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rg7m-6vh7-f4v2",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-40572"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-269"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40572.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-40572",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519791,
  "published_at": "2026-04-18T00:16:02.59+00:00"
}