CVE-2021-4102: Google Chromium V8 Use-After-Free Vulnerability

CVE-2021-4102 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-12-15

A use-after-free vulnerability in the Google Chromium V8 engine allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability has been observed being exploited in the wild and affects multiple Chromium-based browsers.

Technologies: Google Chromium V8. Vendors: Google.

Quick answers

Is CVE-2021-4102 exploited in the wild?
Yes. CVE-2021-4102 is known to be exploited in the wild, first recorded on 15 December 2021. Treat it as urgent.
How severe is CVE-2021-4102?
Critical severity, with a CVSS score of 8.8, published 15 December 2021.
Which products and versions are affected?
Google Chrome prior to 96.0.4664.110; Microsoft Edge; Opera Opera.
Is there a fix for CVE-2021-4102?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-4102 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2021-4102?
Check whether you run Google Chromium V8. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Google Chrome prior to 96.0.4664.110
  • Microsoft Edge
  • Opera Opera

Timeline

  • 2021-12-13: advisory: Google released stable channel update 96.0.4664.110 for desktop.
  • 2021-12-15: disclosed: Vulnerability published and added to CISA KEV catalog.
  • 2021-12-15: kev added
  • 2021-12-15: exploited: Reported as exploited in the wild.

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