What is CVE-2021-0463?

CVE-2021-0463 is a medium-severity vulnerability in Google Android, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-03-10.

How severe is CVE-2021-0463?

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

Out-of-bounds Read in Google Android

CVE-2021-0463

In convertToHidl of convert.cpp, there is a possible out of bounds read due to uninitialized data from ReturnFrameworkMessage. This could lead to local information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154867068

Vulnerability class: Buffer Overflow

Published 2021-03-10 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.001 (2.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.5% 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
Android — versions Android kernel

Weakness classification (CWE)

References

source.android.com/security/bulletin/pixel/2021-03-01 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-0463?: CVE-2021-0463 is a medium-severity vulnerability in Google Android, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2021-03-10.
How severe is CVE-2021-0463?: Medium severity. CVSS v3 base score is 5.5 out of 10.