What’s Vulnerable › Vulnerabilities

CVE-2021-30555

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-02 · updated 2026-06-17
• Weakness: CWE-416

Description

Use after free in Sharing in Google Chrome prior to 91.0.4472.114 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted HTML page and user gesture.

Affected products

• Google Chrome: before 91.0.4472.114 — fixed in 91.0.4472.114

How to fix

Upgrade to a fixed version: Google Chrome 91.0.4472.114. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop_17.html
• https://crbug.com/1215029
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
• https://security.gentoo.org/glsa/202107-06
• https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop_17.html
• https://crbug.com/1215029
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
• https://security.gentoo.org/glsa/202107-06

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