Intelligence View
USN-8279-3: Linux kernel (NVIDIA Tegra IGX) vulnerabilities
It was discovered that the Linux kernel algif_aead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container.…
handle in-place cryptographic operations. This flaw is known as Copy Fail.
A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Cryptographic API;
- Ethernet bonding driver;
- SMB network file system;
- Netfilter;
- io_uring subsystem;
- Packet sockets;
- TLS protocol;
(CVE-2024-35862, CVE-2024-50060, CVE-2026-23274, CVE-2026-23351,
CVE-2026-31419, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033,
CVE-2026-43077, CVE-2026-43078)
SOC Incident Playbook: Vulnerability Remediation & Verification
title: Detect Exploitation - USN-8279-3: Linux kernel (NVIDIA Tegra IGX) vulnerabilities
id: e273eb63-275f-4eed-b54e-243d419b1e67
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_accessrule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-25"
description = "YARA Signature for "
strings:
$str = "USN-8279-3: Linux kernel (NVID" ascii wide
condition:
any of them
}index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("USN-8279-3 Linux kernel NVIDIA Tegra IGX")
| 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 - countmessage: "*USN-8279-3 Linux kernel NVIDIA Tegra IGX*"CommonSecurityLog
| where Message has "USN-8279-3 Linux kernel NVIDIA Tegra IGX"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount descMITRE ATT&CK Matrix Navigator 14 Taktiken
Supply-Chain Blast Radius & Dependency Topology CVE-2026-31431
EU NIS2 / ISO 27001 Remediation SLA Tracker CVE-2026-31431
Upstream Security Patch & Git Diff CVE-2026-31431
Zero-Trust Micro-Segmentation & Quarantine CVE-2026-31431
#!/usr/sbin/nft -f
# ISS-ZeroTrust Quarantine Policy for CVE-2026-31431
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-2026-31431] " drop
}
}apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: quarantine-CVE-2026-31431
namespace: production
labels:
security.isharestuff.com/quarantine: "true"
cve.mitigation/id: "CVE-2026-31431"
spec:
podSelector:
matchLabels:
app.kubernetes.io/vulnerable-cve: "CVE-2026-31431"
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-2026-31431" or http.request.body.mime contains "exploit" or cf.threat_score gt 20)
Operative Incident Triage Checklist
Echtzeit-Expositionsrechner & NIS-2 Risiko
Erhöhte Gefahr der Ausnutzung. Vorrangige Intervention, WAF-Virtual-Patching und Ingress-Filterung binnen 24h.
Mobile Terminal Incident Commands
sudo nft add rule inet filter input ct state new tcp dport { 80, 443, 8080, 8443, 3000 } drop comment "EMERGENCY_QUARANTINE_CVE-2026-31431"
curl -fsSL "https://tsecurity.de/api/v1/patch_diff.php?cve=CVE-2026-31431" | git apply --check -v && curl -fsSL "https://tsecurity.de/api/v1/patch_diff.php?cve=CVE-2026-31431" | git apply -v
sudo grep -E -i "(eval\(|base64_decode|\.\./|/etc/passwd|/bin/sh|cmd\.exe)" /var/log/{nginx,apache2,httpd,syslog}* 2>/dev/null | tail -n 50
kubectl label pods -A -l app.kubernetes.io/name=linux quarantine=isolated --overwrite
Angriffsvektor & Schutzschichten-Matrix
Angreifer penetrieren Perimeter und WAF ungehindert. Schicht 3 (Micro-Segmentierung & Port-Drop) bildet die entscheidende Stop-Linie zur Schadenseindämmung.
Hersteller-Sicherheitsmeldungen & Patch-Status
Hersteller hat ein verifiziertes Patch-Release herausgegeben. Sofortiges Rollout auf Test- und Produktivsystemen empfohlen.
-
Linux Kernel Git Commit Verifiziertkernel.org
-
Linux Kernel Git Commit Verifiziertkernel.org
-
Linux Kernel Git Commit Verifiziertkernel.org
-
Linux Kernel Git Commit Verifiziertkernel.org
-
Linux Kernel Git Commit Verifiziertkernel.org
tsecurity.de Cognitive Threat RAG
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich USN-8279-3: Linux kernel (NVIDIA Tegra I.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
- 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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