CVE-2021-30633

9.6 CRITICAL CISA KEV - Actively Exploited

Published: October 08, 2021 Modified: October 24, 2025

Description

Use after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html

Source: chrome-cve-admin@google.com

Release Notes

https://crbug.com/1247766

Source: chrome-cve-admin@google.com

Permissions Required

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/

Source: chrome-cve-admin@google.com

Release Notes

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/

Source: chrome-cve-admin@google.com

Release Notes

https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop.html

Source: af854a3a-2127-422b-91ae-364da2661108

Release Notes

https://crbug.com/1247766

Source: af854a3a-2127-422b-91ae-364da2661108

Permissions Required

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/

Source: af854a3a-2127-422b-91ae-364da2661108

Release Notes

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/

Source: af854a3a-2127-422b-91ae-364da2661108

Release Notes

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30633

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

9 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.6 / 10.0

EPSS (Exploit Probability)

38.2%

97th percentile

Exploitation Status

Actively Exploited

Remediation due: 2021-11-17

Weaknesses (CWE)

CWE-416 CWE-416

Affected Vendors

fedoraproject google

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