tcp_v6_syn_recv_sock. The manipulation results in race condition.This vulnerability is known as CVE-2026-43198. Access to the local network is required for this attack. No exploit is available.
It is suggested to upgrade the affected component.
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⚡ tsecurity.de Intelligence
CVE-2026-43198 | Linux Kernel up to 6.18.15/6.19.5 tcp_v6_syn_recv_sock race condition (Nessus ID 321690)
A vulnerability was found in Linux Kernel up to 6.18.15/6.19.5 and classified as critical. Affected is the function tcp_v6_syn_recv_sock. The manipulation results in race condition. This vulnerability is known as CVE-2026-43198. Access to…
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A vulnerability was found in Linux Kernel up to 6.18.15/6.19.5 and classified as critical. Affected is the function
This vulnerability is known as CVE-2026-43198. Access to the local network is required for this attack. No exploit is available.
It is suggested to upgrade the affected component.
This vulnerability is known as CVE-2026-43198. Access to the local network is required for this attack. No exploit is available.
It is suggested to upgrade the affected component.
IoC Intelligence (1 Indikatoren)
CVE-2026-43198
CTI Threat Relationship Graph3 Knoten / 2 Relationen
IR-PLAYBOOK-VULN-REMEDIATIONMEDIUM
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title: Detect Exploitation - CVE-2026-43198 | Linux Kernel up to 6.18.15/6.19.5 tcp_v6_syn_recv_sock race condition (Nessus ID 321690)
id: 7d7db5b5-6eed-4215-b630-fe9ca9e52b2d
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-24
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-24"
description = "YARA Signature for "
strings:
$str = "CVE-2026-43198 | Linux Kernel " ascii wide
condition:
any of them
}INFRASTRUCTURE BLAST RADIUS & EXPOSURE
Live-Vektor: LOCAL
LOCALIZED
Perimeter & Ingress
Geringes Risiko
Lateral Pivot & AD
Geringes Risiko
Crown Jewels & DB
Geringes Risiko
Supply Chain Reach
GEFÄHRDET (90%)
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich CVE-2026-43198 | Linux Kernel up to 6.18.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
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