CVE-2021-21166: Google Chromium Race Condition Vulnerability

CVE-2021-21166 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-11-03

A race condition in the audio component of Google Chromium allows a remote attacker to potentially cause heap corruption via a specially crafted HTML page. This vulnerability has been observed being exploited in the wild and affects multiple Chromium-based browsers.

Technologies: Google Chromium. Vendors: Google.

Quick answers

Is CVE-2021-21166 exploited in the wild?
Yes. CVE-2021-21166 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-21166?
Critical severity, with a CVSS score of 8.8, published 3 November 2021.
Which products and versions are affected?
Google Chrome prior to 89.0.4389.72; Microsoft Edge; Opera Opera.
Is there a fix for CVE-2021-21166?
A patch was published on 2021-03-02: Chrome version 89.0.4389.72 released to address the issue. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-21166 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2021-21166?
Check whether you run Google Chromium. 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 89.0.4389.72
  • Microsoft Edge
  • Opera Opera

Timeline

  • 2021-03-02: patched: Chrome version 89.0.4389.72 released to address the issue.
  • 2021-11-03: kev added: Added to CISA's Known Exploited Vulnerabilities Catalog.
  • 2021-11-03: disclosed

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