CVE-2021-0320 Race condition in Android

What is CVE-2021-0320?

CVE-2021-0320 is a medium-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 is_device_locked and set_device_locked of keystore_keymaster_enforcement.h, there is a possible bypass of lockscreen requirements for keyguard bound keys due to a race condition. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android; Versions: Android-10, Android-11; Android ID: A-169933423.

Weakness: CWE-362

Which versions are affected by CVE-2021-0320?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0320?

Apply the vendor's patch.

Is CVE-2021-0320 being exploited?

There is no known exploitation of CVE-2021-0320 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-169933423, ASB-A-169933423, GHSA-6pfh-vwh5-gvrc.