CVE-2026-40317 - Vulnerability Analysis
CriticalCVSS: 9.3Last Updated: April 18, 2026
NovumOS - Privilege Escalation
Overview
NovumOS < 0.24 contains a local privilege escalation caused by lack of validation on Syscall 12 (JumpToUser) entry point address, letting Ring 3 user-mode processes execute arbitrary code in Ring 0 context, exploit requires local user access.
Severity & Score
Impact
Local users can escalate privileges to kernel level, gaining full control of the system.
Mitigation
Update to version 0.24 or later.
References
Social Media Activity(2 posts)
š“ CVE-2026-40317 - Critical (9.3) 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 pr... š https://www.thehackerwire.com/vulnerability/CVE-2026-40317/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack
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š“ CVE-2026-40317 - Critical (9.3) 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 pr... š https://www.thehackerwire.com/vulnerability/CVE-2026-40317/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack
View original postRelated Resources
Details
- CVE ID
- CVE-2026-40317
- Severity
- Critical
- CVSS Score
- 9.3
- Type
- broken_access_control
- Status
- new
- EPSS
- 0.0%
- Social Posts
- 2
CWE
- CWE-20
CVSS Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H