{"id":"CVE-2026-40572","summary":"NovumOS has Arbitrary Memory Mapping via Syscall 15 (MemoryMapRange)","details":"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.","aliases":["GHSA-rg7m-6vh7-f4v2"],"modified":"2026-08-12T03:51:16.565259334Z","published":"2026-04-18T00:16:02.590Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-269"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40572.json"},"references":[{"type":"WEB","url":"https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40572.json"},{"type":"ADVISORY","url":"https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-rg7m-6vh7-f4v2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40572"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/minecanton209/novumos","events":[{"introduced":"0"},{"fixed":"2fd365cd7c483ddf552de0ce81906eb05bb92bea"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.24"}],"source":"AFFECTED_FIELD"}}],"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"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"}]}