CVE-2021-4102
HighExploitedPublic exploitUse after free in V8 in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Published Dec 15, 2021 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2021-4102, UBUNTU-CVE-2021-4102
Key Facts
Patch immediately- CVE-2021-4102 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Chrome (Google), chromium (arch), opera (arch) and 15 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 9, 2021. Public exploit code is available.
- EPSS estimates a 7.8% probability of exploitation in the next 30 days.
- Fixed versions are available, including Chrome 96.0.4664.110, chromedriver 96.0.4664.110-1.1, chromedriver 96.0.4664.110-bp153.2.48.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
7.8%
Higher than 94.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-4102 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Use after free in V8 in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Dec 15, 2021 | Dec 29, 2021 | Not reported |
| Industry KEV feed | Dec 9, 2021 | Dec 29, 2021 | Not reported |
| CIRCL KEV | Dec 15, 2021 | Dec 29, 2021 | Not reported |
| ENISA EUVD | Dec 15, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
39 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ChromeGoogle | >= unspecified | 96.0.4664.110 |
| chromiumarch | See advisory | 96.0.4664.110-1 |
| operaarch | See advisory | 82.0.4227.43-1 |
| vivaldiarch | See advisory | 5.0.2497.30-1 |
| chromium-browserubuntu | See advisory | 97.0.4692.71-0ubuntu0.18.04.1 |
Patched Releases
Chrome
96.0.4664.110
chromedriver
96.0.4664.110-1.1, 96.0.4664.110-bp153.2.48.1, 96.0.4664.110-lp152.2.143.1
chromium
96.0.4664.110-1, 96.0.4664.110-1.1, 96.0.4664.110-bp153.2.48.1, 96.0.4664.110-lp152.2.143.1, 97.0.4692.71-0.1, 97.0.4692.71-0.1~deb11u1
chromium-browser
97.0.4692.71-0ubuntu0.18.04.1
libqt5-qtpdf-devel
5.15.8-1.1
libqt5-qtpdf-examples
5.15.8-1.1
libqt5-qtpdf-imports
5.15.8-1.1
libqt5-qtpdf-private-headers-devel
5.15.8-1.1
libqt5-qtwebengine
5.15.8-1.1
libqt5-qtwebengine-devel
5.15.8-1.1
libqt5-qtwebengine-examples
5.15.8-1.1
libqt5-qtwebengine-private-headers-devel
5.15.8-1.1
libQt5Pdf5
5.15.8-1.1
libQt5PdfWidgets5
5.15.8-1.1
opera
82.0.4227.43-1, 83.0.4254.27-lp153.2.33.1, 85.0.4341.28-lp154.2.5.1
ungoogled-chromium
113.0.5672.92-1.1
ungoogled-chromium-chromedriver
113.0.5672.92-1.1
vivaldi
5.0.2497.30-1
Timeline
Added to Industry KEV feed
Dec 9, 2021
Publicly disclosed
Dec 15, 2021
Added to CISA KEV
Dec 15, 2021
Added to CIRCL KEV
Dec 15, 2021
Added to ENISA EUVD
Dec 15, 2021
Last updated
Aug 4, 2026
Weakness Type
- CWE-416 Use After Free
References
- advisoryhttps://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop_13.html
- advisoryhttps://crbug.com/1278387
- advisoryhttps://indianexpress.com/article/technology/tech-news-technology/google-chrome-releases-emergency-update-to-fix-multiple-security-vulnerabilities-7673638/
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2021-4102
- advisoryhttps://ubuntu.com/security/CVE-2021-4102
FAQ
Common Questions.
Use after free in V8 in Google Chrome prior to 96.0.4664.110 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Affected: Chrome (Google) versions >= unspecified; chromium (arch); opera (arch), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 9, 2021.
Yes. It was added on Dec 15, 2021 with a federal remediation due date of Dec 29, 2021.
Public exploit code is available.
Fixed versions are available, including Chrome 96.0.4664.110, chromedriver 96.0.4664.110-1.1, chromedriver 96.0.4664.110-bp153.2.48.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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