What’s Vulnerable › Vulnerabilities

CVE-2021-21233

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-30 · updated 2026-06-17
• Weakness: CWE-787

Description

Heap buffer overflow in ANGLE in Google Chrome on Windows prior to 90.0.4430.93 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 32, 33, 34
• Google Chrome: before 90.0.4430.93 — fixed in 90.0.4430.93

How to fix

Upgrade to a fixed version: Google Chrome 90.0.4430.93. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.html
• https://crbug.com/1182937
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
• https://security.gentoo.org/glsa/202104-08
• https://www.debian.org/security/2021/dsa-4911
• https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.html
• https://crbug.com/1182937
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/

Get alerted when CVE-2021-21233 or the next vulnerability affects your stack