Insufficient data validation in V8 in Google Chrome prior to 90.0.4430.93 allowed a remote attacker to potentially exploit heap corruption…

published 2021-04-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8622

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

Insufficient data validation in V8 in Google Chrome prior to 90.0.4430.93 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Patch / fix

fixed in 1 distros 5

Google Chrome 90.0.4430.93

debian ubuntu opensuse alpine arch linux

chromium Debian 14, Debian 13, Debian 12 90.0.4430.93-1

debian advisories DEBIAN-CVE-2021-21231

chromium-browser Ubuntu 18.04 LTS 90.0.4430.93-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2021-21231

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

chromium openSUSE Tumbleweed 93.0.4577.82-1.1
chromium openSUSE Tumbleweed 113.0.5672.92-1.1
opera openSUSE Leap 15.2 NonFree 76.0.4017.107-lp152.2.46.1
chromium openSUSE Leap 15.2 90.0.4430.93-lp152.2.89.1

opensuse advisories openSUSE-SU-2024:10681-1 openSUSE-SU-2024:12948-1 openSUSE-SU-2021:0729-1 openSUSE-SU-2021:0629-1

qt5-qtwebengine Alpine 3.23, Alpine 3.22, Alpine 3.21 +7 more 5.15.3_git20210510-r0

alpine advisories ALPINE-CVE-2021-21231

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

vivaldi Arch Linux 3.8.2259.37-1
chromium Arch Linux 90.0.4430.93-1

arch linux advisories AVG-1828 AVG-1871

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-21231 updated 2025-11-21 cvss 8.8

chromium-browser: Insufficient data validation in V8

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Google Chrome

Classification

Weakness

CWE-787 Out-of-bounds Write

Technology feeds

Google Chrome rss critical rss

References

security.gentoo.org /glsa/202104-08
vendor-advisory, third-party-advisory
debian.org /security/2021/dsa-4911
vendor-advisory, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
vendor-advisory
chromereleases.googleblog.com /2021/04/stable-channel-update-for-desktop_26.html
release-notes, vendor-advisory
crbug.com /1198696
broken-link, vendor-advisory

Sources

CVE List CVE-2021-21231
NVD CVE-2021-21231

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary