CVE-2025-32467: TDX Module Information Disclosure Flaw

CVE-2025-32467 Overview

CVE-2025-32467 is an uninitialized memory use vulnerability affecting Intel Trust Domain Extensions (TDX) Module versions prior to tdx1.5. The flaw exists within Ring 0: Hypervisor code where an uninitialized variable may be accessed, potentially leading to information disclosure. This vulnerability requires local access with privileged user permissions and represents a high-complexity attack scenario with specific attack requirements.

Critical Impact

Privileged local attackers with hypervisor access may exploit uninitialized memory to extract sensitive information from protected trust domains, potentially compromising confidential computing workloads.

Affected Products

• Intel TDX Module versions before tdx1.5
• Systems utilizing Intel Trust Domain Extensions (TDX) technology
• Hypervisor environments with TDX-enabled workloads

Discovery Timeline

• 2026-02-10 - CVE-2025-32467 published to NVD
• 2026-02-10 - Last updated in NVD database

Technical Details for CVE-2025-32467

Vulnerability Analysis

The vulnerability stems from CWE-457 (Use of Uninitialized Variable), a memory corruption class issue where code logic accesses memory that has been allocated but not properly initialized before use. In the context of Intel TDX Module, this occurs within the hypervisor layer (Ring 0), which is responsible for managing trust domains and maintaining isolation between confidential computing workloads.

When uninitialized memory is read, it may contain residual data from previous operations, including potentially sensitive information such as cryptographic keys, memory addresses, or data from other trust domains. The local attack vector combined with privileged user requirements indicates that an attacker would need existing access to the hypervisor environment to exploit this vulnerability.

The high attack complexity and specific attack requirements suggest that successful exploitation depends on particular system states or configurations being present. The impact is confined to confidentiality compromise with no effect on system integrity or availability.

Root Cause

The root cause is improper variable initialization within the Intel TDX Module's hypervisor code. Memory allocated for variables in Ring 0 operations is not being properly zeroed or initialized before use, creating a condition where stale memory contents may be inadvertently disclosed. This type of vulnerability often occurs in low-level system code where performance optimizations may skip initialization routines, or where complex control flow paths leave certain code branches with uninitialized state.

Attack Vector

Exploitation requires local access to the target system with privileged user permissions (hypervisor-level access). The attacker must manipulate the execution environment to trigger code paths that access the uninitialized variable at a point where it contains sensitive data. The high complexity rating indicates that exploitation is not straightforward and may require precise timing, specific system configurations, or particular workload patterns to be successful.

The vulnerability mechanism involves accessing memory locations that have not been properly initialized. For detailed technical information, see the Intel Security Advisory SA-01397.

Detection Methods for CVE-2025-32467

Indicators of Compromise

• Unusual memory access patterns in TDX Module execution logs
• Unexpected hypervisor behavior during trust domain operations
• Anomalous memory read operations from Ring 0 components
• Debug or diagnostic outputs showing potentially sensitive data exposure

Detection Strategies

• Monitor TDX Module version deployments across the infrastructure to identify systems running versions prior to tdx1.5
• Implement hypervisor-level logging to detect suspicious memory access patterns in TDX operations
• Deploy hardware security monitoring solutions capable of detecting anomalous Ring 0 behavior
• Conduct regular security audits of TDX-enabled systems and configurations

Monitoring Recommendations

• Enable comprehensive logging for Intel TDX Module operations where available
• Implement asset inventory tracking to identify all systems with TDX-enabled workloads
• Configure alerts for unexpected changes to hypervisor configurations
• Monitor for indicators of local privilege escalation attempts that could precede exploitation

How to Mitigate CVE-2025-32467

Immediate Actions Required

• Inventory all systems running Intel TDX Module and identify versions prior to tdx1.5
• Prioritize patching for systems handling sensitive confidential computing workloads
• Review and restrict hypervisor-level access to minimize the attack surface
• Implement enhanced monitoring on TDX-enabled systems until patches are applied

Patch Information

Intel has addressed this vulnerability in TDX Module version tdx1.5 and later. Organizations should update to the patched version as soon as possible. For detailed patch information and download links, refer to the Intel Security Advisory SA-01397.

Workarounds

• Restrict hypervisor-level access to only essential personnel and verified processes
• Implement strict access controls and multi-factor authentication for administrative access to TDX-enabled systems
• Consider isolating critical TDX workloads on dedicated hardware until patches can be applied
• Enable additional logging and monitoring to detect potential exploitation attempts

# Verify Intel TDX Module version (example command structure)
# Consult Intel documentation for specific version checking procedures
# Ensure TDX Module is updated to tdx1.5 or later