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.
References
| Link | Resource |
|---|---|
| https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24 | Release Notes |
| https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm | Exploit Vendor Advisory |
| https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm | Exploit Vendor Advisory |
Configurations
History
27 Apr 2026, 14:05
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:minecanton209:novumos:*:*:*:*:*:*:*:* | |
| First Time |
Minecanton209
Minecanton209 novumos |
|
| References | () https://github.com/MinecAnton209/NovumOS/releases/tag/v0.24 - Release Notes | |
| References | () https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm - Exploit, Vendor Advisory |
20 Apr 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/MinecAnton209/NovumOS/security/advisories/GHSA-xjx3-gjh9-45fm - |
18 Apr 2026, 01:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-18 01:16
Updated : 2026-04-27 14:05
NVD link : CVE-2026-40317
Mitre link : CVE-2026-40317
CVE.ORG link : CVE-2026-40317
JSON object : View
Products Affected
minecanton209
- novumos