CVE-2025-20054 in Processor
Summary
by MITRE • 05/14/2025
Uncaught exception in the core management mechanism for some Intel(R) Processors may allow an authenticated user to potentially enable denial of service via local access.
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Analysis
by VulDB Data Team • 09/01/2025
The vulnerability identified as CVE-2025-20054 represents a critical flaw within the core management mechanisms of certain Intel processors, specifically affecting the handling of exceptions within the processor's management framework. This issue manifests as an uncaught exception that occurs during normal processor operations, creating a potential pathway for unauthorized disruption of system services. The vulnerability requires local authentication to exploit, meaning that an attacker must first establish a legitimate user session on the target system before attempting to leverage this weakness. The affected processors are part of Intel's broader product line, though specific model ranges remain undisclosed in the initial vulnerability report, indicating that this may be a widespread issue affecting multiple processor generations.
Technical analysis reveals that the root cause stems from inadequate error handling within the processor's management engine, where certain operational conditions trigger exceptions that are not properly intercepted or managed by the system's fault handling mechanisms. When these unhandled exceptions occur, they can cause the processor's management subsystem to enter an undefined state, potentially leading to system instability, application crashes, or complete system hang conditions. The vulnerability operates at a low-level hardware abstraction layer, making it particularly dangerous as it can affect system-wide operations rather than just individual applications. This type of flaw typically falls under CWE-459, which addresses incomplete cleanup of resources, and may also relate to CWE-755, indicating improper handling of exceptions in the system's core components.
The operational impact of CVE-2025-20054 extends beyond simple denial of service, as the unhandled exception can potentially create a persistent state that affects system reliability and performance over time. An authenticated attacker with local access could repeatedly trigger the exception condition to maintain ongoing disruption of system services, making this vulnerability particularly concerning for environments where continuous system availability is critical. The local access requirement suggests that this vulnerability may be exploited through legitimate user accounts, potentially through privilege escalation attacks or by leveraging existing system access. From an attack framework perspective, this vulnerability aligns with ATT&CK technique T1499, which covers network denial of service attacks, though the specific implementation targets the system's management infrastructure rather than network protocols. The vulnerability could also be leveraged as part of a broader attack chain, where an initial compromise leads to local access that then enables exploitation of this processor-level weakness.
Mitigation strategies for CVE-2025-20054 primarily focus on system updates and firmware patches provided by Intel, which would address the underlying exception handling flaw within the processor management mechanisms. Organizations should prioritize applying these updates across all affected systems, particularly in environments where system availability is paramount. Additional defensive measures include implementing robust system monitoring to detect unusual exception patterns, establishing strict access controls to limit local authentication opportunities, and maintaining detailed system logs that can help identify exploitation attempts. Network segmentation and privilege separation can further reduce the attack surface, as limiting local access points reduces the likelihood of exploitation. Security teams should also consider implementing automated patch management systems to ensure timely deployment of Intel's security updates, as these vulnerabilities often require hardware-level fixes that cannot be addressed through software patches alone. The vulnerability's nature suggests that it may be difficult to detect through conventional security scanning tools, making proactive patch management and system monitoring essential defensive measures.