CVE-2021-21148: Google Chromium V8 Heap Buffer Overflow Vulnerability

CVE-2021-21148 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-11-03

A heap buffer overflow vulnerability exists in the Google Chromium V8 engine. A remote attacker can exploit this via a specially crafted HTML page to cause heap corruption, potentially leading to arbitrary code execution.

Technologies: Google Chromium V8. Vendors: Google.

Quick answers

Is CVE-2021-21148 exploited in the wild?
Yes. CVE-2021-21148 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-21148?
Critical severity, with a CVSS score of 8.8, published 3 November 2021.
Which products and versions are affected?
Google Chrome prior to 88.0.4324.150; Google V8 Engine prior to 88.0.4324.150; Microsoft Edge; Opera Opera.
Is there a fix for CVE-2021-21148?
A patch was published on 2021-02-04: Stable channel update for desktop 88.0.4324.150 released. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-21148 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2021-21148?
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 88.0.4324.150
  • Google V8 Engine prior to 88.0.4324.150
  • Microsoft Edge
  • Opera Opera

Timeline

  • 2021-02-04: patched: Stable channel update for desktop 88.0.4324.150 released.
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
  • 2021-11-03: disclosed: Publicly published.

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