CVE-2025-47332: Memory Corruption Vulnerability

CVE-2025-47332 Overview

CVE-2025-47332 is a memory corruption vulnerability that occurs while processing a config call from userspace. This vulnerability stems from a Time-of-Check Time-of-Use (TOCTOU) race condition (CWE-367), where a resource's state can change between when it is checked and when it is used, leading to memory corruption and potential local privilege escalation.

Critical Impact

A local attacker with high privileges could exploit this race condition to corrupt memory, potentially leading to arbitrary code execution, privilege escalation, or system compromise on affected Qualcomm devices.

Affected Products

• Qualcomm chipsets and firmware (refer to the Qualcomm January 2026 Security Bulletin for complete list)

Discovery Timeline

• 2026-01-07 - CVE CVE-2025-47332 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-47332

Vulnerability Analysis

This vulnerability exists in the handling of configuration calls from userspace, where a race condition allows memory corruption to occur. The TOCTOU race condition represents a class of vulnerability where the system checks a condition (such as validating input parameters or permissions) and then performs an action based on that check, but the underlying data or state can be modified by an attacker between these two operations.

In this case, when processing configuration calls from userspace, the vulnerable code path allows an attacker with local access and elevated privileges to exploit the timing window between validation and usage. This can result in the corruption of critical memory structures, potentially allowing the attacker to achieve arbitrary read/write primitives or execute malicious code with elevated kernel-level privileges.

The local attack vector means physical access or existing code execution on the device is required, though the low attack complexity indicates exploitation is relatively straightforward once an attacker has the necessary local access.

Root Cause

The root cause is a Time-of-Check Time-of-Use (TOCTOU) race condition (CWE-367) in the config call processing logic. The vulnerability arises when userspace configuration data is validated at one point in time, but the actual memory operation uses the data at a later time without proper synchronization or re-validation. An attacker can modify the shared data between these two operations, causing the system to operate on corrupted or malicious data.

Attack Vector

The attack requires local access to the system with high-level privileges. An attacker would need to:

1. Identify the vulnerable config call interface exposed to userspace
2. Craft a malicious configuration request that passes initial validation
3. Race to modify the shared memory or parameters between the check and use operations
4. Trigger the memory corruption when the system acts on the modified data

The exploitation mechanics involve carefully timing the modification of shared data structures to win the race condition, which may require multiple attempts but is achievable due to the low attack complexity.

Detection Methods for CVE-2025-47332

Indicators of Compromise

• Unexpected kernel crashes or system instability when processing configuration calls
• Anomalous memory access patterns or corruption detected by kernel protection mechanisms
• Unusual privilege escalation attempts from local processes

Detection Strategies

• Monitor system logs for kernel panics or memory corruption errors related to config processing
• Implement integrity checking on critical kernel data structures
• Use hardware-assisted memory protection features where available
• Deploy endpoint detection solutions capable of identifying race condition exploitation attempts

Monitoring Recommendations

• Enable comprehensive kernel logging to capture config call processing events
• Monitor for suspicious local privilege escalation activity
• Implement anomaly detection for unusual system call patterns
• Review audit logs for repeated failed or suspicious configuration requests

How to Mitigate CVE-2025-47332

Immediate Actions Required

• Review the Qualcomm January 2026 Security Bulletin for affected products
• Apply firmware updates provided by device manufacturers as they become available
• Limit local access to trusted users until patches can be deployed
• Monitor affected systems for signs of exploitation attempts

Patch Information

Qualcomm has addressed this vulnerability in their January 2026 security bulletin. Device manufacturers and OEMs should incorporate the relevant patches into their firmware updates. End users should apply updates from their device manufacturers as soon as they become available.

For detailed patch information, refer to the Qualcomm January 2026 Security Bulletin.

Workarounds

• Restrict local access to affected devices to trusted personnel only
• Implement strict access controls to limit which processes can make configuration calls
• Where possible, isolate vulnerable components using sandboxing or containerization
• Monitor and audit configuration call activity for suspicious patterns