What is CVE-2021-0978?

CVE-2021-0978 is a low-severity vulnerability in Google Android, classified under Missing Authorization. CVSS score: 3.3/10. Published 2021-12-15.

How severe is CVE-2021-0978?

Low severity. CVSS v3 base score is 3.3 out of 10.

Auth bypass in Google Android

CVE-2021-0978

In getSerialForPackage of DeviceIdentifiersPolicyService.java, 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 information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-12Android ID: A-192587406

Vulnerability class: Broken Access Control

Published 2021-12-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (0.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android — versions 12.0
Android — versions Android-12

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

source.android.com/security/bulletin/pixel/2021-12-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-0978?: CVE-2021-0978 is a low-severity vulnerability in Google Android, classified under Missing Authorization. CVSS score: 3.3/10. Published 2021-12-15.
How severe is CVE-2021-0978?: Low severity. CVSS v3 base score is 3.3 out of 10.