Is this vulnerability remotely exploitable?

Not by itself. It is a local privilege escalation issue, meaning an attacker must already be able to run or control a process in user mode (Ring 3) on the affected NovumOS system. However, remote vulnerabilities that yield user-level access could be chained with this issue to obtain kernel privileges.

What level of access is required to exploit this vulnerability?

Exploitation requires the ability to execute code as a Ring 3 user-mode process. Once that access is available, invoking Syscall 12 (JumpToUser) with a crafted entry point address can allow execution of arbitrary code in Ring 0.

What is the safest general fix pattern for this class of bug?

The safest pattern is to enforce strict validation of all addresses and selectors involved in privilege transitions. Any syscall or mechanism that returns from kernel to user mode should verify that the target instruction pointer and segments refer to legitimate user-space memory with the appropriate privilege level, and must not accept kernel-space targets derived from user-controlled state.

Severity:

CRITICAL RISK

(9.3)

Improper Input Validation in Syscall Entry Point (CWE-20) Enables Ring 0 Escalation in NovumOS

CVE-2026-40317

Published:

Apr 17, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-74;CWE-89

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

Database Compromise and Data Integrity Loss

April 27, 2026

CWE-863

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Privilege Escalation and Unauthorized Session Control

April 27, 2026

Vulnerability Type

Category:

Improper Input Validation / Privilege Management

CWE:

CWE-20;CWE-269

Impact:

Local Privilege Escalation to Ring 0

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Input Validation / Privilege Management

CWE:

CWE-20;CWE-269

Impact:

Local Privilege Escalation to Ring 0

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

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Improper Input Validation in Syscall Entry Point (CWE-20) Enables Ring 0 Escalation in NovumOS

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

SQL Injection via Unsanitized ID Parameter (CWE-89) in Pharmacy Sales and Inventory System /ajax.php

HIGH RISK

HIGH

(8.5)

Incorrect Authorization (CWE-863) in OpenClaw chat.send Session Management

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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