What is CVE-2020-0309?

CVE-2020-0309 is a medium-severity vulnerability in Google Android, classified under Integer Overflow or Wraparound. CVSS score: 6.7/10. Published 2020-09-18.

How severe is CVE-2020-0309?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Google Android

CVE-2020-0309

In the Bluetooth server, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with System privileges and a Firmware compromise needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-147227320

Vulnerability class: Integer Overflow

Published 2020-09-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.6% 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 11.0
Android — versions Android-11

Weakness classification (CWE)

References

source.android.com/security/bulletin/android-11 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-0309?: CVE-2020-0309 is a medium-severity vulnerability in Google Android, classified under Integer Overflow or Wraparound. CVSS score: 6.7/10. Published 2020-09-18.
How severe is CVE-2020-0309?: Medium severity. CVSS v3 base score is 6.7 out of 10.