What is CVE-2016-3821?

CVE-2016-3821 is a critical-severity vulnerability in Google Android, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2016-08-05.

How severe is CVE-2016-3821?

Critical severity. CVSS v3 base score is 9.8 out of 10.

NULL pointer dereference in Google Android

CVE-2016-3821

libmedia in mediaserver in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-08-01 has certain incorrect declarations, which allows remote attackers to execute arbitrary code or cause a denial of service (NULL pointer dereference or memory corruption) via a crafted media file, aka internal bug 28166152.

Published 2016-08-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.2th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Google Android — versions 4.0, 4.0.1, 4.0.2

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

source.android.com/security/bulletin/2016-08-01.html (Vendor Advisory)
android.googlesource.com/platform/frameworks/av/+/42a25c46b844518ff0d0b920c20c5… (Patch, Issue Tracking)
www.securityfocus.com/bid/92228 (vdb-entry)

Frequently asked questions

What is CVE-2016-3821?: CVE-2016-3821 is a critical-severity vulnerability in Google Android, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2016-08-05.
How severe is CVE-2016-3821?: Critical severity. CVSS v3 base score is 9.8 out of 10.