CVE-2025-20801 Overview
CVE-2025-20801 is a race condition vulnerability in the MediaTek seninf (Sensor Interface) driver component that can lead to memory corruption. The seninf driver is responsible for handling camera sensor data on MediaTek-powered Android devices. Due to improper synchronization in concurrent memory operations, an attacker who has already obtained System privilege can exploit this flaw to achieve local escalation of privilege without any user interaction.
Critical Impact
This vulnerability enables local privilege escalation through memory corruption caused by a race condition in the MediaTek seninf driver, potentially allowing attackers with System privileges to gain further elevated access on affected Android devices.
Affected Products
- Google Android 13.0, 14.0, 15.0, and 16.0
- MediaTek MT6878, MT6897, MT6899, MT6985, MT6989, MT6991, MT6993
- MediaTek MT8792, MT8796, MT8798
Discovery Timeline
- 2026-01-06 - CVE-2025-20801 published to NVD
- 2026-01-08 - Last updated in NVD database
Technical Details for CVE-2025-20801
Vulnerability Analysis
This vulnerability exists in the MediaTek seninf driver, which manages the sensor interface for camera functionality on Android devices. The flaw stems from a race condition (CWE-362) that can trigger a double-free condition (CWE-415), resulting in memory corruption. The race condition occurs when concurrent operations attempt to access or modify shared memory resources without proper synchronization mechanisms in place.
The seninf driver processes sensor data at high speed to support camera functionality, and the time-critical nature of these operations creates opportunities for race conditions when multiple threads or processes interact with the same memory regions. When exploited successfully, the resulting memory corruption can be leveraged by an attacker to escalate privileges on the device.
Root Cause
The vulnerability originates from inadequate synchronization controls in the seninf driver when handling concurrent memory operations. The race condition manifests as a Time-of-Check Time-of-Use (TOCTOU) issue where the state of memory can change between when it is validated and when it is used. This improper handling leads to a double-free condition where the same memory allocation is freed more than once, corrupting heap metadata and potentially allowing arbitrary code execution or privilege escalation.
Attack Vector
The attack vector is local, meaning an attacker must have existing code execution on the device. The exploitation requires the attacker to have already obtained System-level privileges on the Android device. The attack does not require user interaction, making it particularly concerning for compromised devices. The attacker would need to trigger specific timing conditions in the seninf driver to exploit the race condition. Successfully exploiting this vulnerability could allow the attacker to corrupt memory in ways that grant higher privileges or execute arbitrary code in a more privileged context.
Detection Methods for CVE-2025-20801
Indicators of Compromise
- Unusual kernel panic or system crashes related to the seninf driver or camera subsystem
- Abnormal memory allocation patterns in kernel logs referencing seninf components
- Unexpected privilege escalation attempts from processes with System privileges
- Evidence of race condition exploitation in kernel audit logs
Detection Strategies
- Monitor Android device logs for kernel crashes or errors originating from the seninf driver component
- Implement runtime detection for double-free conditions using memory debugging tools
- Deploy SentinelOne Singularity Mobile to detect anomalous privilege escalation behavior on Android endpoints
- Review system logs for repeated rapid operations targeting the camera sensor interface
Monitoring Recommendations
- Enable enhanced kernel logging on affected Android devices to capture seninf driver events
- Configure security monitoring solutions to alert on unusual memory access patterns in kernel space
- Monitor for firmware modification attempts targeting MediaTek chipset drivers
- Implement behavioral analysis for privilege escalation attempts following System-level compromise
How to Mitigate CVE-2025-20801
Immediate Actions Required
- Apply the latest security patches from your device manufacturer that include patch ID ALPS10251210
- Ensure Android devices are updated to the latest available security patch level
- Restrict physical access to affected devices until patches are applied
- Monitor affected devices for signs of compromise or unusual behavior
Patch Information
MediaTek has released a security update addressing this vulnerability with Patch ID ALPS10251210 (Issue ID: MSV-4926). The fix is documented in the MediaTek Security Bulletin for January 2026. Device manufacturers should incorporate this patch into their Android security updates, and end users should install the latest security patches from their device vendors.
Workarounds
- Limit access to applications that require System-level privileges until patching is complete
- Implement strict application whitelisting to prevent unauthorized code from executing with elevated privileges
- Consider disabling or restricting camera functionality on high-security devices until the patch is applied
- Use SentinelOne mobile threat defense to detect and block exploitation attempts
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
