CVE-2025-27708 Overview
CVE-2025-27708 is an out-of-bounds read vulnerability affecting the firmware for some Intel Converged Security and Management Engine (CSME). This firmware-level vulnerability exists within Ring 0 (Kernel) and may allow an attacker with privileged local access to disclose sensitive information from memory regions that should not be accessible.
Critical Impact
Privileged local attackers can exploit this out-of-bounds read condition to access confidential data from Intel CSME firmware memory, potentially exposing cryptographic keys, security configurations, or other sensitive information managed by the security engine.
Affected Products
- Intel Converged Security and Management Engine (CSME) Firmware
- Systems utilizing affected Intel CSME firmware versions
Discovery Timeline
- 2026-02-10 - CVE-2025-27708 published to NVD
- 2026-02-10 - Last updated in NVD database
Technical Details for CVE-2025-27708
Vulnerability Analysis
This vulnerability is classified as CWE-125 (Out-of-bounds Read), a memory corruption flaw where the firmware reads data from memory locations outside the intended buffer boundaries. The Intel CSME operates as a dedicated security subsystem within Intel processors, running independently from the main CPU and managing critical security functions including hardware-based security features, remote management capabilities, and cryptographic operations.
The out-of-bounds read condition occurs within Ring 0 (Kernel level) of the CSME firmware, which represents the highest privilege level within the security engine. When exploited, an attacker can read memory contents beyond allocated buffer boundaries, potentially accessing sensitive data stored in adjacent memory regions. The vulnerability requires local access to the system and privileged user credentials, combined with specific attack requirements being present.
The impact is limited to confidentiality exposure with no direct effect on integrity or availability. However, the information disclosed could include security-sensitive data managed by the CSME, such as encryption keys, security policies, or platform configuration data that could facilitate further attacks.
Root Cause
The root cause stems from improper bounds checking within the CSME firmware's kernel-level code. When processing certain data structures or memory operations, the firmware fails to properly validate that read operations remain within the allocated buffer boundaries. This allows read operations to access memory outside the intended data structure, resulting in information disclosure.
Attack Vector
Exploitation requires local access to the target system along with privileged user credentials. The attacker must have the ability to interact with the CSME firmware through local interfaces. While the attack complexity is low once access is obtained, specific attack requirements must be present, and no user interaction is needed. The local attack vector and privileged access requirements limit the exposure, but successful exploitation can yield high-value confidential information from the security engine.
The attack does not require special internal knowledge of the system, making it potentially exploitable by any privileged local user who can access the appropriate CSME interfaces. Since no user interaction is required, the attack can be executed silently once the attacker has established the necessary local privileged access.
Detection Methods for CVE-2025-27708
Indicators of Compromise
- Unusual access patterns to Intel CSME firmware interfaces or management engine components
- Unexpected memory read operations or access attempts targeting CSME-related system resources
- Anomalous privileged user activity involving Intel management engine tools or utilities
Detection Strategies
- Monitor system logs for unusual Intel Management Engine Interface (MEI) driver activity or errors
- Implement endpoint detection rules to identify suspicious interactions with CSME firmware components
- Track privileged user sessions for abnormal patterns of accessing low-level system management interfaces
Monitoring Recommendations
- Enable verbose logging for Intel Management Engine drivers and related system components
- Deploy SentinelOne endpoint protection with firmware-level threat detection capabilities
- Establish baselines for normal CSME-related system activity to identify deviations
- Monitor for unauthorized firmware inspection or dumping tools being executed on systems
How to Mitigate CVE-2025-27708
Immediate Actions Required
- Review the Intel Security Advisory SA-01315 for affected firmware versions and remediation guidance
- Inventory all systems with Intel CSME to determine exposure to this vulnerability
- Prioritize firmware updates for systems handling sensitive data or in high-risk environments
- Restrict local privileged access to minimize the attack surface
Patch Information
Intel has released information regarding this vulnerability through Intel Security Advisory SA-01315. Organizations should consult this advisory for specific details on affected firmware versions and available updates. Firmware updates should be obtained through official Intel channels or system manufacturer support portals to ensure authenticity and compatibility.
Workarounds
- Limit local privileged access to systems with affected Intel CSME firmware to authorized personnel only
- Implement strict access controls and monitoring for systems containing sensitive data
- Consider network segmentation to isolate systems with vulnerable firmware until patches can be applied
- Enable all available security features within system BIOS/UEFI to reduce potential attack surface
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
