Is CVE-2021-37973 actively exploited?

CVE-2021-37973 has no public evidence of in-the-wild exploitation as of 2025-10-24.

What is the CVSS score for CVE-2021-37973?

CVE-2021-37973 has a CVSS score of 9.6 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

How do I patch CVE-2021-37973?

Patch guidance is available from google security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-37973.

Fix CVE-2021-37973 - CRITICAL google chrome

Q: Which products are affected by CVE-2021-37973?

5 products: google chrome, fedoraproject fedora, fedoraproject fedora, debian debian linux, debian debian linux.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-416 · Use After Free CWE-416 · Use After Free

Metadata

Primary Vendor: GOOGLE
Published: 10/8/2021
Last Modified: 10/24/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

google : chromefedoraproject : fedorafedoraproject : fedoradebian : debian_linuxdebian : debian_linux

Remediation Guidance

Executive Summary

View on NIST NVD