Vulnerability Details : CVE-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.
Published 2021-10-08 22:15:08
Updated 2024-07-26 19:39:06
Source Chrome
View at NVD,   CVE.org
Vulnerability category: Memory Corruption

Products affected by CVE-2021-37973

CVE-2021-37973 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Google Chromium Portals Use-After-Free Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
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 Microso
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-37973
Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-37973

EPSS FAQ
0.41%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 73 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-37973

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.8
 MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:P
8.6
6.4
 NIST
9.6
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
2.8
6.0
 NIST

CWE ids for CVE-2021-37973

  • The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-37973

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