CVEs / CVE-2021-37973
CVE-2021-37973: Google Chromium Portals Use-After-Free Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- critical 9.6 CVSS 3.1 (NVD)
- EPSS 11.7% chance of exploitation in the next 30 days, higher than 96% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Google Chrome | from unspecified, before 94.0.4606.61 | 94.0.4606.61 |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 17 Nov 2021 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 9.6 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-416 |
References
- CVE-2021-37973 on NVD
- CVE-2021-37973 in the CISA KEV catalog
- CVE-2021-37973 on OSV
- https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_24.html Release Notes
- https://crbug.com/1251727 Issue Tracking, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/ Release Notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/ Release Notes
- https://www.debian.org/security/2022/dsa-5046 Mailing List, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-37973 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.