CVE-2023-21337 Information disclosure in Android

What is CVE-2023-21337?

CVE-2023-21337 is a high-severity vulnerability in Google Android, published on 30 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In InputMethod, there is a possible way to determine whether an app is installed, without query permissions, due to side channel information disclosure. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Weakness: CWE-203

Which versions are affected by CVE-2023-21337?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2023-21337?

No fix has been published for CVE-2023-21337 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-21337 being exploited?

There is no known exploitation of CVE-2023-21337 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 GHSA-3c9j-r976-x5vf.