CVE-2018-16884 — CVE & Security Advisory Radar

🎯 CVE-2018-16884 🇪🇺 EUVD

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CVE-2018-16884 | A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

Klassifikation & Betroffenheit:

[UNKNOWN] kernel: n/alinux linux_kernel *redhat enterprise_linux 7.0redhat enterprise_mrg 2.0debian debian_linux 8.0canonical ubuntu_linux 14.04canonical ubuntu_linux 16.04

Improper Restriction of Operations within the Bounds of a Memory Buffer 🎯 High

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

🛡️ Empfohlene Mitigation: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow prot…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-14 · Client-side Injection-induced Buffer Ove… (High) CAPEC-24 · Filter Failure through Buffer Overflow (High) CAPEC-42 · MIME Conversion (High) CAPEC-44 · Overflow Binary Resource File (Very High) CAPEC-45 · Buffer Overflow via Symbolic Links (High) CAPEC-100 · Overflow Buffers (Very High) CAPEC-123 · Buffer Manipulation (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2019-14894 8.0 CVE-2017-7466 8.0 CVE-2020-1712 7.8 CVE-2018-16858 7.8 CVE-2018-16837 7.8

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2018

Veröffentlicht 12/2018

Heute 17.09.

CVSS-Vektor-Analyse: 6.5

AV · Angriffsvektor Benachbart

AC · Komplexität Hoch

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Verändert

C · Vertraulichkeit Keine

I · Integrität Gering

A · Verfügbarkeit Hoch

CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H

Veröffentlicht:18.12.2018

Aktualisiert:17.06.2026 01:44

Assigner (CNA):redhat

EUVD-ID:EUVD-2018-8674

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-08-29	2026-09-16
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

6.5 MEDIUM

🇪🇺 EUVD

EPSS

1.5%

CVE-2018-16884 🌐 Adjacent Network 🔑 Geringe Nutzerrechte nötig

[UNKNOWN]

CVE-2018-16884 | A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

18.12.2018

🛡️ Details ➔

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