CVE-2026-40317

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Source

https://cve.org/CVERecord?id=CVE-2026-40317

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40317.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-40317

Aliases

GHSA-xjx3-gjh9-45fm

Published

2026-04-18T00:12:10.368Z

Modified

2026-07-15T01:48:49.874475746Z

Severity

9.3 (Critical) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator

Summary

NovumOS has Privilege Escalation in the Syscall Interface

Details

NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly. In versions prior to 0.24, Syscall 12 (JumpToUser) accepts an arbitrary entry point address from user-space registers without validation, allowing any Ring 3 user-mode process to jump to kernel addresses and execute arbitrary code in Ring 0 context, resulting in local privilege escalation. This issue has been fixed in version 0.24. If developers are unable to immediately update, they should restrict syscall access by running the system in single-user mode without Ring 3, and disable user-mode processes by only running kernel shell with no user processes. This issue has been fixed in version 0.24.

Database specific

{
    "cwe_ids": [
        "CWE-20",
        "CWE-269"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40317.json",
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/minecanton209/novumos

Affected ranges

Type

GIT

Repo

https://github.com/minecanton209/novumos

Events

Introduced

Fixed

2fd365cd7c483ddf552de0ce81906eb05bb92bea

Database specific

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.24"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*

v0.20

v0.20.1

v0.21

v0.23

v0.23-beta.2

v0.23-beta.3

v0.23-beta.4

v0.23-beta.5

v0.23-beta.6

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40317.json"