CVE-2021-21222

MEDIUM 6.5CVE-2021-21222 · Published 26/04/2021 · updated 17/06/2026

In short

CVE-2021-21222 is a MEDIUM (CVSS 6.5) vulnerability affecting chrome (google).
Chance of exploitation in the next 30 days (EPSS): 1.8%, higher than 78.1% 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

Heap buffer overflow in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page.

References

chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_20.html · Release Notes
crbug.com/1194046 · Third Party Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A
security.gentoo.org/glsa/202104-08 · Third Party Advisory
debian.org/security/2021/dsa-4906 · Third Party Advisory

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