What is CVE-2020-0021?

CVE-2020-0021 is a medium-severity vulnerability in Google Android, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2020-02-13.

How severe is CVE-2020-0021?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Google Android

CVE-2020-0021

In removeUnusedPackagesLPw of PackageManagerService.java, there is a possible permanent denial-of-service due to a missing package dependency test. This could lead to remote denial of service with User execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10Android ID: A-141413692

Published 2020-02-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Google Android — versions 10.0
Android — versions Android-10

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

source.android.com/security/bulletin/2020-02-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2020-0021?: CVE-2020-0021 is a medium-severity vulnerability in Google Android, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2020-02-13.
How severe is CVE-2020-0021?: Medium severity. CVSS v3 base score is 6.5 out of 10.