What’s Vulnerable › Vulnerabilities

CVE-2021-4055

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-23 · updated 2026-06-17
• Weakness: CWE-787

Description

Heap buffer overflow in extensions in Google Chrome prior to 96.0.4664.93 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension.

Affected products

• Debian Linux: 10.0, 11.0
• Fedoraproject Fedora: 34
• Google Chrome: before 96.0.4664.93 — fixed in 96.0.4664.93

How to fix

Upgrade to a fixed version: Google Chrome 96.0.4664.93. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop.html
• https://crbug.com/1266510
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744/
• https://security.gentoo.org/glsa/202208-25
• https://www.debian.org/security/2022/dsa-5046
• https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop.html
• https://crbug.com/1266510
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744/
• https://security.gentoo.org/glsa/202208-25
• https://www.debian.org/security/2022/dsa-5046

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