The exploitation of CVE-2024-1086, a high-severity privilege escalation flaw in the Linux kernel’s *netfilter: nf_tables* component, has been confirmed by CISA as actively used in ransomware attacks. Introduced via a decade-old commit (2014), this use-after-free vulnerability allows attackers with local access to gain root-level privileges, enabling full system takeover. Once exploited, attackers can disable security defenses, modify critical files, install malware (including ransomware), move laterally across networks, and exfiltrate sensitive data. The flaw affects major Linux distributions (Debian, Ubuntu, Fedora, Red Hat) running kernel versions 3.15 to 6.8-rc1. A public proof-of-concept (PoC) exploit was released in March 2024, accelerating adoption by threat actors. CISA added CVE-2024-1086 to its Known Exploited Vulnerabilities (KEV) catalog in May 2024, mandating federal agencies to patch systems by June 20, 2024, or apply mitigations (e.g., blocklisting *nf_tables*, restricting user namespaces, or deploying the unstable Linux Kernel Runtime Guard (LKRG)). Failure to mitigate risks system compromise, data theft, operational disruption, and potential ransomware deployment, threatening critical infrastructure and government operations. The flaw’s widespread impact across federal systems amplifies risks of large-scale data breaches, financial losses, and reputational damage if left unaddressed.
TPRM report: https://www.rankiteo.com/company/federal-cio-council
"id": "fed4892648103125",
"linkid": "federal-cio-council",
"type": "Ransomware",
"date": "6/2014",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization’s existence"{'affected_entities': [{'industry': 'Public Sector',
'location': 'United States',
'name': 'Federal Agencies (U.S.)',
'type': 'Government'},
{'location': 'Global', 'type': 'Organizations'}],
'attack_vector': 'Local Access (Use-after-free in netfilter: nf_tables)',
'customer_advisories': ['Patch systems immediately',
'Apply mitigations if patching is not feasible'],
'data_breach': {'data_exfiltration': 'Potential (via lateral movement)'},
'date_publicly_disclosed': '2024-01-31',
'description': 'CISA confirmed that a high-severity privilege escalation flaw '
'in the Linux kernel (CVE-2024-1086), a use-after-free '
'weakness in the netfilter: nf_tables component, is being '
'exploited in ransomware attacks. The vulnerability, '
'introduced in 2014 and patched in January 2024, allows '
'attackers with local access to escalate privileges to '
'root-level, leading to system takeover, lateral movement, and '
'data theft. A PoC exploit was published in March 2024, '
'targeting kernel versions 5.14 to 6.6. The flaw impacts major '
'Linux distributions (e.g., Debian, Ubuntu, Fedora, Red Hat). '
'CISA added it to its KEV catalog in May 2024 and mandated '
'federal agencies to patch by June 20, 2024.',
'impact': {'operational_impact': ['System takeover',
'Defense bypass',
'File modification',
'Malware installation',
'Lateral movement',
'Data theft'],
'systems_affected': ['Linux systems (kernel versions 3.15 to '
'6.8-rc1)',
'Major distributions: Debian, Ubuntu, Fedora, '
'Red Hat']},
'initial_access_broker': {'entry_point': 'Local access (via compromised user '
'account or malware)',
'high_value_targets': ['Linux servers',
'Federal systems']},
'investigation_status': 'Ongoing (exploitation confirmed, details limited)',
'motivation': ['Financial Gain (Ransomware)', 'System Compromise'],
'post_incident_analysis': {'corrective_actions': ['Mandatory patching for '
'federal systems',
'Mitigation guidelines for '
'unpatchable systems',
'Inclusion in CISA KEV '
'catalog for prioritized '
'remediation'],
'root_causes': ['Decade-old vulnerable commit '
'(February 2014) in netfilter: '
'nf_tables',
'Delayed patching or mitigation '
'application']},
'ransomware': {'data_exfiltration': 'Potential'},
'recommendations': ['Patch Linux kernel to latest version (>= 6.8-rc1 or '
'vendor-provided fixes)',
"Blocklist 'nf_tables' if not actively used",
'Restrict user namespace access to limit attack surface',
'Monitor for suspicious privilege escalation attempts',
'Apply vendor-specific mitigations or discontinue use if '
'patches are unavailable'],
'references': [{'source': 'CISA Known Exploited Vulnerabilities (KEV) Catalog',
'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog'},
{'source': 'Immersive Labs Analysis on CVE-2024-1086'},
{'source': "GitHub PoC Exploit by 'Notselwyn'",
'url': 'https://github.com'}],
'regulatory_compliance': {'regulatory_notifications': ['CISA KEV catalog '
'inclusion (May 2024)',
'Federal agency patch '
'mandate (deadline: '
'June 20, 2024)']},
'response': {'containment_measures': ["Blocklist 'nf_tables' if unused",
'Restrict access to user namespaces',
'Load Linux Kernel Runtime Guard (LKRG) '
'module (with caution)'],
'remediation_measures': ['Patch systems (mandated by June 20, '
'2024 for federal agencies)',
'Discontinue use if mitigations '
'unavailable']},
'stakeholder_advisories': ['CISA alert for federal agencies',
'Vendor advisories (Debian, Ubuntu, Fedora, Red '
'Hat)'],
'title': 'Exploitation of Linux Kernel Privilege Escalation Flaw '
'(CVE-2024-1086) in Ransomware Attacks',
'type': ['Privilege Escalation', 'Ransomware'],
'vulnerability_exploited': 'CVE-2024-1086'}