A critical out of bounds write vulnerability in the Android kernel allows a local attacker to achieve privilege escalation without requiring user interaction.

The vulnerability resides in multiple functions within mem_protect.c, where an integer overflow leads to an out of bounds write. This flaw allows a local user with low privileges to escalate their access rights on the device.

The ability for a local attacker to escalate privileges to a higher level of authority poses a severe risk to device integrity and user data privacy. Given the CVSS score of 7.8, this vulnerability is classified as High severity, as it bypasses standard Android security boundaries and could allow unauthorized access to sensitive system resources.

Immediate Action: Review the December 2025 Android Security Bulletin and apply the latest kernel security updates provided by your device manufacturer.

Proactive Monitoring: Monitor system logs for unusual process activity or attempts to access restricted memory regions that deviate from standard operating behavior.

Compensating Controls: Ensure that device security policies, such as mandatory access control, are strictly enforced to limit the potential impact of local privilege escalation attempts.

Public Exploit Available: Unknown

This vulnerability represents a significant security risk to Android devices by enabling unauthorized privilege escalation. Security teams should prioritize the deployment of the December 2025 security patches to all managed Android endpoints to mitigate the risk of local exploitation.