CVE-2021-37973
Google Chromium Portals Use-After-Free Vulnerability
Published Oct 8, 2021 · updated Jun 16, 2026 · google chrome
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.
Timeline
Detection, updates, and resolution for this record.
Oct 8, 2021 · Catalog
Detected
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.
Nov 3, 2021 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Nov 17, 2021 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
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.
Required action
Apply updates per vendor instructions.
CISA due date Nov 17, 2021
Affected
- cpe debian/debian linux10.0
- cpe debian/debian linux11.0
- cpe fedoraproject/fedora33
- cpe fedoraproject/fedora35
- cpe google/chromeversion unspecified
- vendor Google Chromium Portalsversion unspecified
Sources
- CISA KEVCVE-2021-37973
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.
cisa.gov - CVE.orgCVE-2021-37973
Official CVE identifier
cve.org - FIRST EPSSCVE-2021-37973
30-day exploitation probability 11.7%
first.org - NIST NVDCVE-2021-37973
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.
nvd.nist.gov