CVE-2021-0307 Privilege escalation in Android

What is CVE-2021-0307?

CVE-2021-0307 is a high-severity vulnerability in Google Android, published on 11 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In updatePermissionSourcePackage of PermissionManagerService.java, there is a possible automatic runtime permission grant due to a confused deputy. This could lead to local escalation of privilege allowing a malicious app to silently gain access to a dangerous permission with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android; Versions: Android-10, Android-11; Android ID: A-155648771.

Which versions are affected by CVE-2021-0307?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0307?

Apply the vendor's patch.

Is CVE-2021-0307 being exploited?

There is no known exploitation of CVE-2021-0307 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as A-155648771, ASB-A-155648771, GHSA-8xfg-5ch9-qcf9.