A high-severity privilege escalation vulnerability in Google Android allows attackers to bypass permission controls through tapjacking, potentially granting malicious applications unauthorized access.

The vulnerability exists within DefaultTransitionHandler.java and facilitates a tapjacking or overlay attack. By tricking the user into interacting with a malicious interface, an attacker can escalate privileges locally without requiring prior elevated permissions.

Successful exploitation of this flaw allows an unprivileged application to gain elevated permissions, effectively bypassing the Android security model. Given the CVSS score of 7.3, this represents a significant risk to data confidentiality and integrity. If exploited, an attacker could access sensitive user data, monitor activities, or perform unauthorized actions on behalf of the user, leading to potential privacy breaches and data exfiltration.

Immediate Action: Update all affected Android devices to the latest security patch level provided by the vendor in the December 2025 Android Security Bulletin.

Proactive Monitoring: Monitor device logs for unusual permission-granting activity or suspicious UI overlays that appear unexpectedly during normal application usage.

Compensating Controls: Advise users to exercise caution when granting permissions to unfamiliar applications and to avoid installing software from untrusted third party sources.

Public Exploit Available: Unknown

This vulnerability poses a substantial risk to Android users by undermining the core permission management system. Security teams should prioritize the deployment of the December 2025 security updates to all managed mobile endpoints. Users should remain vigilant regarding permission requests and ensure their devices are fully patched to mitigate the risk of unauthorized privilege escalation.