What is CVE-2018-21084?

CVE-2018-21084 is a high-severity vulnerability in Google Android, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2020-04-08.

How severe is CVE-2018-21084?

High severity. CVSS v3 base score is 8.1 out of 10.

Use After Free in Google Android

CVE-2018-21084

An issue was discovered on Samsung mobile devices with L(5.1), M(6.0), and N(7.x) software. There is a race condition with a resultant read-after-free issue in get_kek. The Samsung ID is SVE-2017-11174 (February 2018).

Vulnerability class: Race Condition

Published 2020-04-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (21.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Google Android — versions 5.1, 6.0, 7.0

Weakness classification (CWE)

References

security.samsungmobile.com/securityUpdate.smsb (Vendor Advisory)

Frequently asked questions

What is CVE-2018-21084?: CVE-2018-21084 is a high-severity vulnerability in Google Android, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2020-04-08.
How severe is CVE-2018-21084?: High severity. CVSS v3 base score is 8.1 out of 10.