What is CVE-2022-20521?

CVE-2022-20521 is a medium-severity vulnerability in Google Android, classified under NULL Pointer Dereference. CVSS score: 5.0/10. Published 2022-12-16.

How severe is CVE-2022-20521?

Medium severity. CVSS v3 base score is 5.0 out of 10.

NULL pointer dereference in Google Android

CVE-2022-20521

In sdpu_find_most_specific_service_uuid of sdp_utils.cc, there is a possible way to crash Bluetooth due to a missing null check. This could lead to local denial of service with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-227203684

Published 2022-12-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (6.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Google Android — versions 13.0
Android — versions Android-13

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

source.android.com/security/bulletin/pixel/2022-12-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2022-20521?: CVE-2022-20521 is a medium-severity vulnerability in Google Android, classified under NULL Pointer Dereference. CVSS score: 5.0/10. Published 2022-12-16.
How severe is CVE-2022-20521?: Medium severity. CVSS v3 base score is 5.0 out of 10.