Use After Free in Google Chrome
CVE-2021-37973
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.
Vulnerability class: Use-After-Free
EPSS: 0.117 (95.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Google Chrome — versions unspecified
- Debian Debian_linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 33, 35
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- chrome-cve-admin@google.com (Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- chrome-cve-admin@google.com (x_refsource_MISC, Release Notes)
- chrome-cve-admin@google.com (x_refsource_FEDORA, vendor-advisory, Release Notes)
- chrome-cve-admin@google.com (x_refsource_FEDORA, vendor-advisory, Release Notes)
- chrome-cve-admin@google.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_DEBIAN)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-37973?
- CVE-2021-37973 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2021-10-08.
- How severe is CVE-2021-37973?
- Critical severity. CVSS v3 base score is 9.6 out of 10.
- Is CVE-2021-37973 known to be exploited?
- Yes. CVE-2021-37973 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.