Vulnerability in Google Chrome
CVE-2021-21166
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.240 (97.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.267 · newest: 0.240 · change: -0.027
Affected products
- Google Chrome — versions unspecified
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 32, 33, 34
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop.html (Release Notes)
- crbug.com/1177465 (Permissions Required)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Release Notes)
- www.debian.org/security/2021/dsa-4886 (vendor-advisory, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202104-08 (vendor-advisory, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-21166?
- CVE-2021-21166 is a high-severity vulnerability in Google Chrome, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.8/10. Published 2021-03-09.
- How severe is CVE-2021-21166?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-21166 known to be exploited?
- Yes. CVE-2021-21166 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.