CVEvulnerability

CVE-2021-21166

8.8 HIGH Known exploited Published 2021-03-09 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Google Chromium Race Condition Vulnerability — Google Chromium

Google Chromium contains a race condition vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Added to KEV: 2021-11-03
Remediation due: 2021-11-17
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-21166

Status: Analyzed
Published: 2021-03-09
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected]): 6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses: CWE-362

Description

Data race in audio in Google Chrome prior to 89.0.4389.72 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected configurations

• google chrome (< 89.0.4389.72) • fedoraproject fedora 32 • fedoraproject fedora 33 • fedoraproject fedora 34 • debian debian linux 10.0

Weakness · CWE (1)

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization weakness

References