What is CVE-2021-21121?

CVE-2021-21121 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2021-02-09.

How severe is CVE-2021-21121?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Use After Free in Google Chrome

CVE-2021-21121

Use after free in Omnibox in Google Chrome on Linux prior to 88.0.4324.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page.

Vulnerability class: Use-After-Free

EPSS: 0.062 (92.7th 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
Microsoft Edge_chromium

Weakness classification (CWE)

CWE-416 — Use After Free

References

chrome-cve-admin@google.com (x_refsource_MISC, Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required, Third Party Advisory, x_refsource_MISC)
chrome-cve-admin@google.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21121?: CVE-2021-21121 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2021-02-09.
How severe is CVE-2021-21121?: Critical severity. CVSS v3 base score is 9.6 out of 10.