What is CVE-2018-9421?

CVE-2018-9421 is a medium-severity vulnerability in Google Android, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2024-11-19.

How severe is CVE-2018-9421?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Google Android

CVE-2018-9421

In writeInplace of Parcel.cpp, there is a possible information leak across processes, using Binder, due to uninitialized data. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.

Published 2024-11-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (0.1th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 0th percentile — 0.1% 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 6.0.1, 6.0, 7.1.2

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

source.android.com/security/bulletin/2018-07-01 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-9421?: CVE-2018-9421 is a medium-severity vulnerability in Google Android, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2024-11-19.
How severe is CVE-2018-9421?: Medium severity. CVSS v3 base score is 5.5 out of 10.