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[ CVE-2021-37973 · Published 8 Oct 2021 ]

Google Chromium Portals Use-After-Free Vulnerability

Exploited · CISA KEV CVSS 9.6 EPSS 12%Fix available

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
  • EPSS: 12% chance of exploitation in the next 30 days (higher than 96% of CVEs)
  • Critical severity: CVSS 9.6

[ Description ]Official description

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.

CISA: Google Chromium Portals contains a use-after-free vulnerability that allows a remote attacker, who has compromised the renderer process, to potentially perform a sandbox escape via a crafted HTML page. This vulnerability affects web browsers that utilize Chromium, including Google Chrome and Microsoft Edge.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 17 Nov 2021): Apply updates per vendor instructions.

[ References ]References