What is CVE-2016-5221?

CVE-2016-5221 is a medium-severity vulnerability in Google Chrome, classified under Integer Overflow or Wraparound. CVSS score: 6.3/10. Published 2017-01-19.

How severe is CVE-2016-5221?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Integer overflow in Google Chrome

CVE-2016-5221

Type confusion in libGLESv2 in ANGLE in Google Chrome prior to 55.0.2883.75 for Mac, Windows and Linux, and 55.0.2883.84 for Android possibly allowed a remote attacker to bypass buffer validation via a crafted HTML page.

Vulnerability class: Integer Overflow

Published 2017-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.011 (63.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Google Chrome
Google Chrome Prior To 55.0.2883.75 For Mac, Windows And Linux, 55.0.2883.84 Android — versions Google Chrome prior to 55.0.2883.75 for Mac, Windows and Linux, and 55.0.2883.84 for Android

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

rhn.redhat.com/errata/RHSA-2016-2919.html (vendor-advisory)
www.securityfocus.com/bid/94633 (vdb-entry)
crbug.com/660854
chromereleases.googleblog.com/2016/12/stable-channel-update-for-desktop.html
security.gentoo.org/glsa/201612-11 (vendor-advisory)

Frequently asked questions

What is CVE-2016-5221?: CVE-2016-5221 is a medium-severity vulnerability in Google Chrome, classified under Integer Overflow or Wraparound. CVSS score: 6.3/10. Published 2017-01-19.
How severe is CVE-2016-5221?: Medium severity. CVSS v3 base score is 6.3 out of 10.