CVE-2020-6418: Google Chromium V8 Type Confusion Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2021-11-03
EPSS: 78.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-02-27 · updated 2026-06-17
Weakness: CWE-843

Description

Type confusion in V8 in Google Chrome prior to 80.0.3987.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

Debian Linux: 9.0, 10.0
Fedoraproject Fedora: 30, 31
Google Chrome: before 80.0.3987.122 — fixed in 80.0.3987.122
RedHat Enterprise Linux Desktop: 6.0
RedHat Enterprise Linux Server: 6.0
RedHat Enterprise Linux Workstation: 6.0

How to fix

Upgrade to a fixed version: Google Chrome 80.0.3987.122. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/156632/Google-Chrome-80-JSCreate-Side-Effect-Type-Confusion.html
https://access.redhat.com/errata/RHSA-2020:0738
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.html
https://crbug.com/1053604
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
https://security.gentoo.org/glsa/202003-08
https://www.debian.org/security/2020/dsa-4638
http://packetstormsecurity.com/files/156632/Google-Chrome-80-JSCreate-Side-Effect-Type-Confusion.html
https://access.redhat.com/errata/RHSA-2020:0738
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.html
https://crbug.com/1053604

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