CVE-2023-21324

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-30 · updated 2026-06-17
Weakness: CWE-203

Description

In Package Installer, 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.

Affected products

Android: before 14.0 — fixed in 14.0

How to fix

Upgrade to a fixed version: Android 14.0. Check the vendor advisory for mitigations.

References

https://source.android.com/docs/security/bulletin/android-14
https://source.android.com/docs/security/bulletin/android-14

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