CVE-2021-0644 Information disclosure in Android

What is CVE-2021-0644?

CVE-2021-0644 is a medium-severity vulnerability in Google Android, published on 6 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In conditionallyRemoveIdentifiers of SubscriptionController.java, there is a possible way to retrieve a trackable identifier due to a missing permission check. This could lead to local information disclosure with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-10Android ID: A-181053462

Weakness: CWE-200

Which versions are affected by CVE-2021-0644?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0644?

Apply the vendor's patch.

Is CVE-2021-0644 being exploited?

There is no known exploitation of CVE-2021-0644 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-181053462, ASB-A-181053462, GHSA-x87c-8v42-cm55.