# 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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-37973
- CVSS: 9.6
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 11.73% (percentile 96.1)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-04)
- Weakness: CWE-416
- Published: 2021-10-08

## Affected versions

- Google Chrome: affected < 94.0.4606.61

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://crbug.com/1251727
- [other] https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_24.html
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
- [advisory] https://www.debian.org/security/2022/dsa-5046
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-37973

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.