What’s Vulnerable › Vulnerabilities

CVE-2021-21193: Google Chromium Blink Use-After-Free Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 10.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-16 · updated 2026-06-17
• Weakness: CWE-416

Description

Use after free in Blink in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 32
• Google Chrome: before 89.0.4389.90 — fixed in 89.0.4389.90

How to fix

Upgrade to a fixed version: Google Chrome 89.0.4389.90. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop_12.html
• https://crbug.com/1186287
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N52OWF4BAP3JNK2QYGU3Q6QUVDZDCIMQ/
• https://security.gentoo.org/glsa/202104-08
• https://www.debian.org/security/2021/dsa-4886
• https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop_12.html
• https://crbug.com/1186287
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N52OWF4BAP3JNK2QYGU3Q6QUVDZDCIMQ/
• https://security.gentoo.org/glsa/202104-08
• https://www.debian.org/security/2021/dsa-4886
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21193

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