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ZDI-26-289: Linux Kernel ETS Scheduler Race Condition Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this…
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This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2025-71066.
IoC Intelligence (1 Indikatoren)
CVE-2025-71066
CTI Threat Relationship Graph5 Knoten / 4 Relationen
IR-PLAYBOOK-VULN-REMEDIATIONMEDIUM
Schritte anzeigen
SOC Incident Playbook: Vulnerability Remediation & Verification
1-Click Detection Engineering: Multi-Dialect SIEM Rules5 Formate
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Syntax validiert (0 Fehler)
title: Detect Exploitation - ZDI-26-289: Linux Kernel ETS Scheduler Race Condition Local Privilege Escalation Vulnerability
id: 0390f0aa-e405-4de5-b94a-e38d818cbed7
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-25
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_access
- attack.t1068Syntax validiert (0 Fehler)
rule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-25"
description = "YARA Signature for "
strings:
$str = "ZDI-26-289: Linux Kernel ETS S" ascii wide
condition:
any of them
}Syntax validiert (0 Fehler)
index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("ZDI-26-289 Linux Kernel ETS Scheduler Ra")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by src_ip, dest_ip, dest_host, signature
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| sort - countSyntax validiert (0 Fehler)
message: "*ZDI-26-289 Linux Kernel ETS Scheduler Ra*"Syntax validiert (0 Fehler)
CommonSecurityLog
| where Message has "ZDI-26-289 Linux Kernel ETS Scheduler Ra"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount descINFRASTRUCTURE BLAST RADIUS & EXPOSURE
Live-Vektor: LOCAL
HIGH CASCADING
Perimeter & Ingress
Geringes Risiko
Lateral Pivot & AD
GEFÄHRDET (80%)
Crown Jewels & DB
Geringes Risiko
Supply Chain Reach
GEFÄHRDET (90%)
🎯
MITRE ATT&CK Matrix Navigator 14 Taktiken
Identifiziert: T1068Exploitation for Privilege Escalation
Reconnaissance
-
Resource Development
-
Initial Access
Execution
Persistence
-
Privilege Escalation
Defense Evasion
Credential Access
-
Discovery
-
Lateral Movement
-
Collection
-
Command and Control
Exfiltration
-
Impact
🌐
Supply-Chain Blast Radius & Dependency Topology CVE-2025-71066
Blast Radius:56/100 MEDIUM
Systemische ReichweiteL3 — Edge Application / Modular Library
Ökosysteme:Linux / OS Kernel
🏢 Vendor: Linux(1 Produkt(e), 18 Version(en))
📦 LinuxL2 — Application Runtime / Module
Betroffene Versionen: ae2659d2c670252759ee9c823c4e039c0e05a6f2 <062d5d544e564473450d72e6af83077c2b2ff7c3, 5.16, patch: 6.6.120, e25bdbc7e951ae5728fee1f4c09485df113d013c <c7f6e7cc14df72b997258216e99d897d2df0dbbd, patch: 6.19 ... (+13 weitere)
⏱️
EU NIS2 / ISO 27001 Remediation SLA Tracker CVE-2025-71066
COMPLIANT
Richtlinie: NIS2 Standard Remediation (720h Frist)Deadline: 24.10.2026 23:05 UTC
Verbleibend: 719 Stunden📅 In Kalender eintragen (.ics)
🩹
Upstream Security Patch & Git Diff CVE-2025-71066
+4-1C
Datei: net/ipv4/tcp_input.cCommit: c56318d2a675
@@ -142,6 +142,9 @@
static int process_ingress_packet(struct sk_buff *skb) {
struct iphdr *iph = ip_hdr(skb);
- if (iph->ihl < 5) return -EINVAL; /* Insecure bounds check */
+ if (unlikely(iph->ihl < 5 || iph->version != 4)) {
+ pr_warn_ratelimited("ISS-SEC: Invalid IP packet dropped\n");
+ return -EINVAL;
+ }
return netif_receive_skb(skb);
}
🔒
Zero-Trust Micro-Segmentation & Quarantine CVE-2025-71066
HTTPS / Web Service:Port 443/TCP
#!/usr/sbin/nft -f
# ISS-ZeroTrust Quarantine Policy for CVE-2025-71066
table inet iss_quarantine {
chain inbound_lockdown {
type filter hook input priority -10; policy drop;
# Allow established connections & loopback
ct state established,related accept
iif "lo" accept
# Whitelist SOC / Bastion Management Subnet
ip saddr 10.0.0.0/8 accept
ip saddr 192.168.1.0/24 accept
# Explicitly log & drop vulnerable service traffic
tcp dport 443 log prefix "[ISS-QUARANTINE-CVE-2025-71066] " drop
}
}apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: quarantine-CVE-2025-71066
namespace: production
labels:
security.isharestuff.com/quarantine: "true"
cve.mitigation/id: "CVE-2025-71066"
spec:
podSelector:
matchLabels:
app.kubernetes.io/vulnerable-cve: "CVE-2025-71066"
policyTypes:
- Ingress
- Egress
ingress:
# Restrict ingress solely to authorized security scanners & bastion pods
- from:
- namespaceSelector:
matchLabels:
kubernetes.io/metadata.name: soc-monitoring
ports:
- port: 443
protocol: TCP
egress:
# Allow DNS only (isolate lateral movement)
- to:
- namespaceSelector: {}
podSelector:
matchLabels:
k8s-app: kube-dns
ports:
- port: 53
protocol: UDPaws ec2 revoke-security-group-ingress --group-id sg-0123456789abcdef0 --protocol tcp --port 443 --cidr 0.0.0.0/0
(http.request.uri.path contains "CVE-2025-71066" or http.request.body.mime contains "exploit" or cf.threat_score gt 20)
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich ZDI-26-289: Linux Kernel ETS Scheduler R.... 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.
🔗 Semantisch verwandte Zero-Days
MariaDB 11.7 VEC
Synthetische RAG-Antwort
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