CVE-2021-30603

Name: CVE-2021-30603
Creator: NVD / NIST
Published: 2021-08-26T18:15:08.527+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.87%

Last modified Jun 17, 2026

CVE-2021-30603 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Data race in WebAudio in Google Chrome prior to 92.0.4515.159 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.. EPSS estimates a 3.87% chance of exploitation in the next 30 days.

Description

Data race in WebAudio in Google Chrome prior to 92.0.4515.159 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.87%

88.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Google	Chrome	< 92.0.4515.159
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35

References

http://packetstormsecurity.com/files/164259/Chrome-HRTFDatabaseLoader-WaitForLoaderThreadCompletion-Data-Race.htmlThird Party Advisory, VDB Entry
https://chromereleases.googleblog.com/2021/08/stable-channel-update-for-desktop.htmlRelease Notes, Vendor Advisory
https://crbug.com/1233564Exploit, Issue Tracking, Patch, Permissions Required, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LVY4WIWTVVYKQMROJJS365TZBKEARCF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPJPUSAWIJMQFBQQQYXAICLI4EKFQOH6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QW4R2K5HVJ4R6XDZYOJCCFPIN2XHNS3L/
http://packetstormsecurity.com/files/164259/Chrome-HRTFDatabaseLoader-WaitForLoaderThreadCompletion-Data-Race.htmlThird Party Advisory, VDB Entry
https://chromereleases.googleblog.com/2021/08/stable-channel-update-for-desktop.htmlRelease Notes, Vendor Advisory
https://crbug.com/1233564Exploit, Issue Tracking, Patch, Permissions Required, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LVY4WIWTVVYKQMROJJS365TZBKEARCF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPJPUSAWIJMQFBQQQYXAICLI4EKFQOH6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QW4R2K5HVJ4R6XDZYOJCCFPIN2XHNS3L/

Timeline

Published: Aug 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30603?

Data race in WebAudio in Google Chrome prior to 92.0.4515.159 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

How severe is CVE-2021-30603?

CVE-2021-30603 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.87% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30603?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30603?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST