Heap buffer overflow in TabStrip in Google Chrome on Windows prior to 89.0.4389.114 allowed a remote attacker to potentially exploit heap c…

published 2021-04-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8587

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

Heap buffer overflow in TabStrip in Google Chrome on Windows prior to 89.0.4389.114 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Patch / fix

fixed in 1 distros 4

Google Chrome 89.0.4389.114

debian ubuntu opensuse alpine

chromium Debian 14, Debian 13, Debian 12 89.0.4389.114-1

debian advisories DEBIAN-CVE-2021-21196

chromium-browser Ubuntu 16.04 LTS 90.0.4430.72-0ubuntu0.16.04.1
chromium-browser Ubuntu 18.04 LTS 90.0.4430.72-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2021-21196

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 75.0.3969.171-lp152.2.40.1
chromium Package Hub 15 SP2 89.0.4389.114-bp152.2.68.1
chromium openSUSE Leap 15.2 89.0.4389.114-lp152.2.83.1

opensuse advisories openSUSE-SU-2024:10681-1 openSUSE-SU-2024:12948-1 openSUSE-SU-2021:0592-1 openSUSE-SU-2021:0515-1 openSUSE-SU-2021:0513-1

chromium Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 89.0.4389.114-r0

alpine advisories ALPINE-CVE-2021-21196

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

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-2021-21196 updated 2025-11-21 cvss 8.8

chromium-browser: Heap buffer overflow in TabStrip

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

1.34% chance of exploitation in the next 30 days, higher than 71% 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
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 /2021/03/stable-channel-update-for-desktop_30.html
release-notes, vendor-advisory
crbug.com /1175992
permissions-required, vendor-advisory

Sources

CVE List CVE-2021-21196
NVD CVE-2021-21196

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