CVE-2025-20004 in Xeon 6
Summary
by MITRE • 05/14/2025
Insufficient control flow management in the Alias Checking Trusted Module for some Intel(R) Xeon(R) 6 processor E-Cores firmware may allow a privileged user to potentially enable escalation of privilege via local access.
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Analysis
by VulDB Data Team • 09/17/2025
The vulnerability identified as CVE-2025-20004 resides within the Alias Checking Trusted Module of Intel Xeon 6 processor E-Cores firmware, representing a critical weakness in the system's control flow management mechanisms. This flaw specifically affects the Trusted Module component responsible for alias checking operations, which are fundamental to maintaining memory address integrity and preventing unauthorized access patterns. The vulnerability manifests when the firmware fails to properly enforce control flow boundaries during alias checking procedures, creating potential pathways for malicious exploitation.
The technical implementation of this vulnerability stems from inadequate validation of control flow transitions within the firmware's alias checking routines. When a privileged user executes specific sequences of operations, the system's control flow management mechanisms fail to properly validate the legitimacy of address aliasing operations. This insufficient oversight allows for potential manipulation of the execution path, enabling an attacker to bypass normal privilege boundaries and escalate their access level. The flaw is particularly concerning because it operates at the firmware level, making it difficult to detect and remediate through conventional software-based security measures.
From an operational perspective, this vulnerability presents a significant risk to systems utilizing Intel Xeon 6 processors with E-Cores, particularly in enterprise environments where privileged user accounts may exist. The local access requirement means that exploitation typically requires an attacker to already possess some level of system privileges, but the potential for privilege escalation makes this a critical concern. The impact extends beyond simple privilege elevation, as successful exploitation could potentially enable broader system compromise, data exfiltration, or persistent access to sensitive information. This vulnerability aligns with CWE-697, which addresses insufficient control flow management, and represents a direct threat to the integrity and confidentiality of systems relying on Intel processor security features.
The attack surface for this vulnerability is primarily limited to systems where the affected firmware components are actively utilized, though the widespread adoption of Intel Xeon processors means that numerous enterprise and data center environments may be impacted. Organizations should prioritize firmware updates from Intel to address this vulnerability, as the remediation requires specific firmware patches that restore proper control flow management within the Alias Checking Trusted Module. Additionally, system administrators should implement monitoring for unusual privilege escalation patterns and consider enhanced access controls for privileged accounts. The remediation process must be carefully coordinated to avoid system downtime, as firmware updates for processor components typically require specific procedures and may impact system availability during deployment.