Google Chromium V8 Type Confusion Vulnerability

HIGH 8.8EXPLOITED (CISA KEV)CVE-2021-21224 · Published 26/04/2021 · updated 17/06/2026

Google Chromium V8 Type Confusion Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 03/11/2021. Patch affected systems as an emergency.

In short

CVE-2021-21224 is a HIGH (CVSS 8.8) vulnerability affecting chrome (google).
Exploited in the wild: CISA added it to the KEV catalog on 03/11/2021.
Chance of exploitation in the next 30 days (EPSS): 84.2%, higher than 99.7% of all vulnerabilities.
Fix: update to 90.0.4430.85 or later.

Package	Affected versions	Patched versions
chrome google	`< 90.0.4430.85`	`90.0.4430.85`

Description

Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.

References

chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_20.html · Release Notes
crbug.com/1195777 · Exploit
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG · Release Notes
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY · Release Notes
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A · Release Notes
security.gentoo.org/glsa/202104-08 · Third Party Advisory
debian.org/security/2021/dsa-4906 · Mailing List
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2021-21224

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Package

Affected versions

Patched versions

chrome

google

< 90.0.4430.85

90.0.4430.85

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