An out-of-bounds write vulnerability in MediaTek imgsensor components allows an attacker with existing system-level access to achieve local privilege escalation.

This is an out-of-bounds write flaw (CWE-787) occurring within the imgsensor driver. While the vulnerability requires the attacker to have already obtained system-level privileges, it allows for further escalation of privilege without user interaction.

The vulnerability carries a CVSS score of 7.8, indicating a high severity due to its potential for total system compromise. If exploited, an attacker could bypass existing security boundaries, leading to unauthorized data access, persistence, or full control over the affected mobile device hardware.

Immediate Action: Apply the vendor-provided security update identified by Patch ID ALPS10089545 as released in the October 2025 MediaTek security bulletin.

Proactive Monitoring: Monitor system logs for unusual driver activity or unexpected process crashes associated with image sensor operations.

Compensating Controls: Ensure that device integrity protections, such as verified boot and restricted SELinux policies, are strictly enforced to limit the impact of post-exploitation activities.

Public Exploit Available: No

Although this vulnerability requires prior system-level access, the risk of privilege escalation is significant for mobile device security. Administrators and device manufacturers should prioritize the deployment of the October 2025 security patch to address the underlying bounds check failure and maintain the security integrity of the affected hardware.