Skip to main content
VulnerabilityPublished Updated

CVE-2026-40317: MinecAnton209 NovumOS · Improper Privilege Management

Affects MinecAnton209 NovumOSSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 9.4 Critical : upgrade to 0.24 as a priority.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
9.4Critical
How severe the flaw is on the 0–10 CVSS scale.

Contested

Critical score, yet low EPSS after six months
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.24
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade NovumOS and minecanton209/NovumOS to 0.24.

Affected software

ProductAffectedFixed in
MinecAnton209NovumOSAffected
  • <0.24
Fixed in
  • 0.24
GitHubminecanton209/NovumOSpkg:github/minecanton209/NovumOSOther threatsAffected
  • <0.24
Fixed in
  • 0.24

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix for this vulnerability is available in NovumOS version 0.24. Users and administrators should upgrade to this version to fully remediate the issue. If upgrading immediately is not feasible, it is recommended to restrict syscall access by running the system in single-user mode without Ring 3 and disabling user-mode processes, operating only with the kernel shell. These mitigations reduce the attack surface until the official fix can be applied.

Description

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

Community reviews

Loading reviews…