NovumOS hat Arbiträre Speichermapping über Syscall 15 (MemoryMapRange)
Plattform
linux
Komponente
novumos
Behoben in
0.24.1
CVE-2026-40572 is a critical vulnerability affecting NovumOS, a custom operating system. It arises from insufficient validation within the MemoryMapRange syscall, enabling user-mode processes to map arbitrary memory regions, including sensitive kernel structures. Successful exploitation allows a local attacker to escalate privileges to kernel context, potentially gaining complete control of the system. This vulnerability impacts NovumOS versions prior to 0.24, and a fix is available in version 0.24.
Auswirkungen und Angriffsszenarien
The impact of CVE-2026-40572 is severe due to its potential for privilege escalation. An attacker exploiting this vulnerability can directly modify critical kernel structures, including the Interrupt Descriptor Table (IDT), Global Descriptor Table (GDT), Thread-Specific Storage (TSS), and page tables. This allows them to hijack interrupt handlers, effectively gaining kernel-level access. The attacker could then execute arbitrary code with the highest privileges, leading to complete system compromise, data theft, and denial of service. This vulnerability is particularly concerning given NovumOS's custom nature, which may limit available security tooling and monitoring capabilities compared to more mainstream operating systems.
Ausnutzungskontext
CVE-2026-40572 was publicly disclosed on 2026-04-18. The vulnerability is not currently listed on CISA KEV, and its EPSS score is pending evaluation. No public proof-of-concept (PoC) code has been released at the time of writing, but the potential for exploitation is high given the direct impact on kernel memory management. Active exploitation campaigns are not currently confirmed.
Bedrohungsanalyse
Exploit-Status
EPSS
0.02% (4% Perzentil)
CISA SSVC
CVSS-Vektor
Was bedeuten diese Metriken?
- Attack Vector
- Lokal — Angreifer benötigt eine lokale Sitzung oder Shell auf dem System.
- Attack Complexity
- Niedrig — keine besonderen Bedingungen erforderlich. Zuverlässig ausnutzbar.
- Privileges Required
- Keine — ohne Authentifizierung ausnutzbar. Keine Zugangsdaten erforderlich.
- User Interaction
- Keine — automatischer und lautloser Angriff. Das Opfer tut nichts.
- Scope
- Geändert — Angriff kann über die anfällige Komponente hinaus auf andere Systeme übergreifen.
- Confidentiality
- Hoch — vollständiger Vertraulichkeitsverlust. Angreifer kann alle Daten lesen.
- Integrity
- Hoch — Angreifer kann beliebige Daten schreiben, ändern oder löschen.
- Availability
- Keine — kein Verfügbarkeitseinfluss.
Betroffene Software
Schwachstellen-Klassifikation (CWE)
Zeitleiste
- Reserviert
- Veröffentlicht
- Geändert
- EPSS aktualisiert
Mitigation und Workarounds
The primary mitigation for CVE-2026-40572 is to immediately upgrade NovumOS to version 0.24 or later, which includes the necessary fix. If upgrading is not immediately feasible due to compatibility concerns or system downtime requirements, consider implementing strict access controls to limit user-mode processes' ability to interact with system memory. While a WAF or proxy is unlikely to be effective against this kernel-level vulnerability, reviewing and hardening system configuration to minimize the attack surface is recommended. There are no specific Sigma or YARA rules readily available for this vulnerability due to its custom nature, but monitoring system calls, particularly Syscall 15 (MemoryMapRange), is advised.
So beheben
Aktualisieren Sie NovumOS auf Version 0.24 oder höher, um die Vulnerabilität zu mindern. Dieses Update behebt das Fehlen der Validierung von beliebigen Speicherbereichen bei der Verwendung der Systemaufruf MemoryMapRange und verhindert so die Privilegienerhöhung.
CVE-Sicherheitsnewsletter
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
Häufig gestellte Fragenwird übersetzt…
What is CVE-2026-40572 — Privilege Escalation in NovumOS?
NovumOS is a custom 32-bit operating system written in Zig and x86 Assembly.
Am I affected by CVE-2026-40572 in NovumOS?
It allows privilege escalation from user to kernel mode, meaning an attacker can gain complete control of the system.
How do I fix CVE-2026-40572 in NovumOS?
If you are using a version of NovumOS prior to 0.24, you are vulnerable.
Is CVE-2026-40572 being actively exploited?
Implement strict access controls and monitor system logs for suspicious activity.
Where can I find the official NovumOS advisory for CVE-2026-40572?
Currently, there are no specific tools available, but updating to version 0.24 is the recommended solution.
Ist dein Projekt betroffen?
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.