CVE-2021-37973

Google Chrome

Published 8 Oct 2021 · updated 17 Jun 2026 · Analyzed

9.6 Critical · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, with a remediation deadline of 17 Nov 2021 for US federal agencies.

Required action: Apply updates per vendor instructions.

Description

Use after free in Portals in Google Chrome prior to 94.0.4606.61 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

References

chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_24.html · Release Notes
crbug.com/1251727 · Issue Tracking, Patch, Vendor Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ · Release Notes
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ · Release Notes
www.debian.org/security/2022/dsa-5046 · Mailing List, Third Party Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-37973 · US Government Resource