CVE-2025-47331 Overview
CVE-2025-47331 is an information disclosure vulnerability that occurs while processing a firmware event. This vulnerability is classified under CWE-126 (Buffer Over-read), which indicates that the flaw involves reading data beyond the intended buffer boundaries, potentially exposing sensitive information stored in memory.
Critical Impact
This vulnerability enables local attackers with low privileges to access sensitive information through improper memory handling during firmware event processing, potentially compromising confidential data stored in memory.
Affected Products
- Qualcomm firmware components (specific products listed in vendor advisory)
- Devices utilizing affected firmware event processing modules
- Systems running vulnerable firmware versions
Discovery Timeline
- January 7, 2026 - CVE-2025-47331 published to NVD
- January 8, 2026 - Last updated in NVD database
Technical Details for CVE-2025-47331
Vulnerability Analysis
This vulnerability stems from a buffer over-read condition (CWE-126) that occurs during the processing of firmware events. When the firmware event handler processes incoming data, it fails to properly validate buffer boundaries, allowing read operations to extend beyond the allocated memory region. This improper bounds checking enables an attacker with local access and low-level privileges to extract sensitive information that should not be accessible.
The local attack vector means exploitation requires the attacker to have existing access to the target system. Once local access is established, the exploitation complexity is low, requiring no user interaction to trigger the vulnerability. The primary impact is to confidentiality, with high potential for sensitive data exposure, while availability impact remains limited.
Root Cause
The root cause of CVE-2025-47331 lies in insufficient boundary validation within the firmware event processing logic. The buffer over-read condition (CWE-126) indicates that the vulnerable code reads beyond the end of an allocated buffer when handling firmware events. This typically occurs when:
- Input length validation is missing or incorrect
- Buffer size calculations are performed using untrusted input
- Pointer arithmetic errors allow reads past buffer boundaries
- Memory access routines lack proper bounds checking
Attack Vector
The attack requires local access to the vulnerable system with low-privilege credentials. An attacker can trigger the vulnerability by crafting malicious firmware events that cause the event handler to read beyond allocated buffer boundaries. The exposed memory contents may include sensitive configuration data, cryptographic material, or other confidential information stored in adjacent memory regions.
The vulnerability can be exploited without user interaction, making it suitable for automated attack scenarios once initial system access is obtained. The information disclosed through this vulnerability could potentially be leveraged for further attacks or to compromise system integrity.
Detection Methods for CVE-2025-47331
Indicators of Compromise
- Unusual firmware event processing activity or errors in system logs
- Unexpected memory access patterns in firmware-related processes
- Abnormal read operations near firmware event handler memory regions
- Security alerts related to out-of-bounds memory access attempts
Detection Strategies
- Monitor firmware event processing logs for anomalous activity patterns
- Implement memory access monitoring for firmware-related components
- Deploy runtime application self-protection (RASP) solutions to detect buffer over-read attempts
- Use endpoint detection and response (EDR) tools to identify suspicious local privilege usage
Monitoring Recommendations
- Enable verbose logging for firmware event handlers where possible
- Configure alerts for repeated firmware event processing failures
- Monitor system calls related to memory access in firmware modules
- Implement file integrity monitoring for firmware components
How to Mitigate CVE-2025-47331
Immediate Actions Required
- Review the Qualcomm Security Bulletin January 2026 for affected products and patches
- Apply vendor-provided firmware updates as soon as they become available
- Restrict local access to systems running vulnerable firmware components
- Implement the principle of least privilege for user accounts with system access
Patch Information
Qualcomm has released security updates addressing this vulnerability in their January 2026 Security Bulletin. Administrators should consult the Qualcomm Security Bulletin January 2026 for specific patch information, affected chipsets, and firmware version details. Apply the recommended firmware updates following the vendor's guidance for your specific hardware platform.
Workarounds
- Limit local system access to only trusted and authorized users
- Implement additional access controls around firmware-related operations
- Monitor and audit local user activity on potentially affected systems
- Consider network segmentation to isolate affected devices until patches can be applied
- Disable or restrict firmware event processing features if operationally feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
